Fix filename length for ar files

[WIP] Try using GnuBuilder

Use rustc_codegen_ssa::back::link instead of copy pasted version

Don't remove incremental cache for sysroot building

This more than halves compilation time for the sysroot

Rustup to rustc 1.36.0-nightly (e938c2b9a 2019-04-23)

Refactor archive.rs for future usage of ar::GnuBuilder

Let the ArArchiveBuilder implement cg_ssa::back::archive::ArchiveBuilder

Rustup to rustc 1.36.0-nightly (33fe1131c 2019-04-20)

Use more rustc_codegen_ssa::back::link for linking

Merge pull request #486 from bjorn3/dependabot/cargo/cranelift-538a066

Bump cranelift from `8456797` to `538a066`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `8456797` to `538a066`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/84567979ba18ad613d0066c0d8129393c9098a9c...538a0662bf90a1daa9921c10f34827ace134abf1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump gimli from `1bcc823` to `70c3730` (#490)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `1bcc823` to `70c3730`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/1bcc82394136549c2c60f19bcb92316fccea5ce4...70c3730b5e3d8669dd2dbcf829fedd4f679185d9)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Rustup to rustc 1.36.0-nightly (3c3d3c177 2019-04-17)

Bump regex from 1.1.5 to 1.1.6 (#483)

Bumps [regex](https://github.com/rust-lang/regex) from 1.1.5 to 1.1.6.
- [Release notes](https://github.com/rust-lang/regex/releases)
- [Changelog](https://github.com/rust-lang/regex/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/regex/compare/1.1.5...1.1.6)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump gimli from `053f9e3` to `1bcc823` (#484)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `053f9e3` to `1bcc823`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/053f9e3c9b219ffa5033760a10726ec2681f1dfb...1bcc82394136549c2c60f19bcb92316fccea5ce4)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Update Cargo.lock

Rustup to rustc 1.35.0-nightly (aa99abeb2 2019-04-14)

Some changes to README.md

Print message when reaching trap

Fix and optimize init intrinsic

Pass --sysroot in config.sh to prevent passing it

Update Cargo.lock

Merge pull request #477 from bjorn3/dependabot/cargo/cranelift-8456797

Bump cranelift from `4bc56b8` to `8456797`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `4bc56b8` to `8456797`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/4bc56b8505a50e9fadbd2ccbe68ffbd3aba8e44e...84567979ba18ad613d0066c0d8129393c9098a9c)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge pull request #471 from bjorn3/dependabot/cargo/cranelift-4bc56b8

Bump cranelift from `cadf244` to `4bc56b8`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `cadf244` to `4bc56b8`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/cadf244ed5a94625d527515dbde4561814445695...4bc56b8505a50e9fadbd2ccbe68ffbd3aba8e44e)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Fix for mutable_borrow_reservation_conflict future compatibility lint

Update cranelift

Merge pull request #467 from bjorn3/dependabot/cargo/cranelift-c08d231

Bump cranelift from `0d2badc` to `c08d231`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `0d2badc` to `c08d231`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/0d2badceb81a1f911b223eed3b42d4d89ac04182...c08d231708e49aeec6cc31e45f2d8aff3cb9372b)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Rustup to rustc 1.35.0-nightly (acd8dd6a5 2019-04-05)

Update dependencies

Update cranelift, faerie and target-lexicon

Bump gimli from `97ab9ea` to `21a3d2b` (#462)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `97ab9ea` to `21a3d2b`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/97ab9ea183cfd3d1fa31395ebed6a4fc9c8f987b...21a3d2b82d2e5d7e5ab37b114fb34b179cdd340d)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Rustup to rustc 1.35.0-nightly (f8673e0ad 2019-04-03)

Merge pull request #448 from bjorn3/dependabot/cargo/cranelift-73aa684

Bump cranelift from `6df7e41` to `73aa684`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `6df7e41` to `73aa684`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/6df7e41f5072b73706c441a5a052908320b9b39c...73aa6849b17d44f00c929ad2e95610ddffa65b8b)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Update Cargo.lock

Rustup to rustc 1.35.0-nightly (e3428db7c 2019-03-31)

Rustup to rustc 1.35.0-nightly (e782d790f 2019-03-29)

Rustup to rustc 1.35.0-nightly (237bf3244 2019-03-28)

Update Cargo.lock

Update Cargo.lock

Rustup to rustc 1.35.0-nightly (fbd34efb3 2019-03-26)

Skip ZST arguments

Fixes #413 and increases compatibility with cg_llvm

Update dependencies

Rustup to rustc 1.35.0-nightly (0576ac109 2019-03-24)

Rustup to rustc 1.35.0-nightly (82e2f3ec2 2019-03-20)

Rustup to rustc 1.35.0-nightly (52e885628 2019-03-15)

Bump gimli from `5763791` to `f1f641c` (#418)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `5763791` to `f1f641c`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/57637915bbb59bb9743dab9cd2b4ff62454f2f93...f1f641c73eaa3caa38ef673e89bffd08469512dd)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Misc changes

Sign extend ints in trans_const_value

Implement weak linkage for statics

Remove "Saved incremental data" warning

Update cranelift

Rustup to rustc 1.35.0-nightly (9d71ec135 2019-03-10)

Update cranelift, faerie and target-lexicon

Bump gimli from `f30aeaa` to `5763791` (#409)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `f30aeaa` to `5763791`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/f30aeaa779b2e3fd0326705a05fb30793827bb93...57637915bbb59bb9743dab9cd2b4ff62454f2f93)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump rand_os from 0.1.2 to 0.1.3 (#404)

Bumps [rand_os](https://github.com/rust-random/rand) from 0.1.2 to 0.1.3.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-random/rand/compare/rand_os-0.1.2...rand_os-0.1.3)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump gimli from `a5f5b72` to `f30aeaa` (#408)

Bumps [gimli](https://github.com/gimli-rs/gimli) from `a5f5b72` to `f30aeaa`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/a5f5b7266646ed41e984b9e48c46b099bc118f17...f30aeaa779b2e3fd0326705a05fb30793827bb93)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump env_logger from 0.6.0 to 0.6.1 (#407)

Bumps [env_logger](https://github.com/sebasmagri/env_logger) from 0.6.0 to 0.6.1.
- [Release notes](https://github.com/sebasmagri/env_logger/releases)
- [Commits](https://github.com/sebasmagri/env_logger/compare/v0.6.0...v0.6.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Fix atomic intrinsics

Fix write_cvalue type assert for late bound regions in trait objects

Remove 0006-alloc-Disable-some-unsupported-stuff.patch

Fix panic with reported const_eval promoted error

Fix trans_get_discriminant for uninhabited types

Bump libc from 0.2.49 to 0.2.50 (#400)

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.49 to 0.2.50.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.49...0.2.50)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge pull request #399 from bjorn3/dependabot/cargo/cfg-if-0.1.7

Bump cfg-if from 0.1.6 to 0.1.7

Merge pull request #398 from bjorn3/dependabot/cargo/gimli-a5f5b72

Bump gimli from `7b828cb` to `a5f5b72`

Bump cfg-if from 0.1.6 to 0.1.7

Bumps [cfg-if](https://github.com/alexcrichton/cfg-if) from 0.1.6 to 0.1.7.
- [Release notes](https://github.com/alexcrichton/cfg-if/releases)
- [Commits](https://github.com/alexcrichton/cfg-if/compare/0.1.6...0.1.7)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump gimli from `7b828cb` to `a5f5b72`

Bumps [gimli](https://github.com/gimli-rs/gimli) from `7b828cb` to `a5f5b72`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/7b828cb40e07e2ea8c403f864aa9ffa9f15b2df4...a5f5b7266646ed41e984b9e48c46b099bc118f17)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge pull request #397 from bjorn3/dependabot/cargo/syn-0.15.27

Merge pull request #395 from bjorn3/dependabot/cargo/cc-1.0.30

Bump syn from 0.15.26 to 0.15.27

Bumps [syn](https://github.com/dtolnay/syn) from 0.15.26 to 0.15.27.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/0.15.26...0.15.27)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump cc from 1.0.29 to 1.0.30

Bumps [cc](https://github.com/alexcrichton/cc-rs) from 1.0.29 to 1.0.30.
- [Release notes](https://github.com/alexcrichton/cc-rs/releases)
- [Commits](https://github.com/alexcrichton/cc-rs/compare/1.0.29...1.0.30)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Rustup to rustc 1.35.0-nightly (87a436377 2019-03-03)

Rename load_value_pair to load_scalar_pair and fix dynamic dispatch with arbitrary self types

Replace functions taking or returning u128 or i128 with a trap

This makes it possible to remove most of 0002-Disable-u128-and-i128-in-libcore.patch.
The rest has to be kept because of u128 and i128 only being used in the function body.

Improve unimpl! docs

Make CastKind::Misc handling more clean and general

Fix cranelift patch paths

Implement CastKind::ClosureFnPointer

Implement ProjectionElem::Subslice

Rustup to rustc 1.34.0-nightly (c1d2d83ca 2019-03-01)

Rustup to rustc 1.34.0-nightly (350674b71 2019-02-28)

Rustup to rustc 1.34.0-nightly (7e001e5c6 2019-02-27)

Merge pull request #380 from bjorn3/dependabot/cargo/gimli-7b828cb

Merge pull request #373 from bjorn3/dependabot/cargo/rand_pcg-0.1.2

Bump gimli from `2c7fcfe` to `7b828cb`

Bumps [gimli](https://github.com/gimli-rs/gimli) from `2c7fcfe` to `7b828cb`.
- [Release notes](https://github.com/gimli-rs/gimli/releases)
- [Commits](https://github.com/gimli-rs/gimli/compare/2c7fcfee8035fe6787c166191fdd8d38bf1d9f35...7b828cb40e07e2ea8c403f864aa9ffa9f15b2df4)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Bump rand_pcg from 0.1.1 to 0.1.2

Bumps [rand_pcg](https://github.com/rust-random/rand) from 0.1.1 to 0.1.2.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-random/rand/compare/0.1.1...rand_pcg-0.1.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge pull request #374 from bjorn3/dependabot/cargo/libc-0.2.49

Bump libc from 0.2.48 to 0.2.49

Bump libc from 0.2.48 to 0.2.49

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.48 to 0.2.49.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.48...0.2.49)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Merge pull request #384 from bjorn3/dependabot/cargo/lazy_static-1.3.0

Bump lazy_static from 1.2.0 to 1.3.0

Bump lazy_static from 1.2.0 to 1.3.0

Bumps [lazy_static](https://github.com/rust-lang-nursery/lazy-static.rs) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/rust-lang-nursery/lazy-static.rs/releases)
- [Commits](https://github.com/rust-lang-nursery/lazy-static.rs/compare/1.2.0...1.3.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Update cranelift

Rustup to rustc 1.34.0-nightly (00aae71f5 2019-02-25)

Rustup to rustc 1.34.0-nightly (aadbc459b 2019-02-23)

Add rust to .gitignore

Rustup to rustc 1.34.0-nightly (e1c6d0057 2019-02-22)

Update cranelift and add a test for bitreverse

Fixes #168 using CraneStation/cranelift#683