Auto merge of #67961 - ehuss:update-cargo, r=alexcrichton

Auto merge of #67961 - ehuss:update-cargo, r=alexcrichton

Update cargo

9 commits in 86134e7666a088682f20b76278c3ee096a315218..6e1ca924a67dd1ac89c33f294ef26b5c43b89168
2019-12-23 16:08:07 +0000 to 2020-01-06 19:11:37 +0000
- Fix dynamic linking for Windows UWP MSVC targets (rust-lang/cargo#7758)
- Fix CARGO_TARGET_triple_LINKER environment variable. (rust-lang/cargo#7763)
- Remove metadata dep_kinds duplicates. (rust-lang/cargo#7756)
- Check for a source defined multiple times. (rust-lang/cargo#7751)
- Fix typo. (rust-lang/cargo#7735)
- Fix config env vars that are prefix of another with underscore. (rust-lang/cargo#7748)
- Add test for `cargo pkgid` (rust-lang/cargo#7741)
- Add a note to the error message for using --feature / --no-default-features in a virtual workspace (rust-lang/cargo#7742)
- Fix debug message. (rust-lang/cargo#7749)