Rollup merge of #56948 - jethrogb:jb/update-llvm, r=nikic

pietroalbini · web-flow · commit 6dca15c0b7cf · 2018-12-19T11:47:21.000+01:00
Update LLVM submodule This includes rust-lang/llvm#133 Fixes #56942
diff --git a/src/llvm b/src/llvm
@@ -1 +1 @@
-Subproject commit 95185c8c801c765ac1072392d081d265af9fb310
+Subproject commit f4728ed8fa2296c5b009bb85550e157e1e57ed0b
