Upgrade to LLVM trunk

diff --git a/src/libcompiler_builtins b/src/libcompiler_builtins
index 939cbca6e9d829265d6cf006d3532142a4061cd3..fe74674f6e4be76d47b66f67d529ebf4186f4eb1 160000 (submodule)
--- a/src/libcompiler_builtins
+++ b/src/libcompiler_builtins
@@ -1 +1 @@
-Subproject commit 939cbca6e9d829265d6cf006d3532142a4061cd3
+Subproject commit fe74674f6e4be76d47b66f67d529ebf4186f4eb1

diff --git a/src/llvm b/src/llvm
index 7051ead40a5f825878b59bf08d4e768be9e99a4a..21a0c9ebc285d794a298e97717abad8d6135fa87 160000 (submodule)
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit 7051ead40a5f825878b59bf08d4e768be9e99a4a
+Subproject commit 21a0c9ebc285d794a298e97717abad8d6135fa87

diff --git a/src/tools/lld b/src/tools/lld
index 2a9b88b8b419d094fb2185c0ca31c28d31bdca00..1928c5eeb613a4c6d232fc47ae91914bbfd92a79 160000 (submodule)
--- a/src/tools/lld
+++ b/src/tools/lld
@@ -1 +1 @@
-Subproject commit 2a9b88b8b419d094fb2185c0ca31c28d31bdca00
+Subproject commit 1928c5eeb613a4c6d232fc47ae91914bbfd92a79