Auto merge of rust-lang#42828 - parched:umulo, r=alexcrichton

bors · bors · commit bd32b1ba0d2d · 2017-06-23T05:25:22.000Z
Update LLVM to fix unsigned multiplication overflow check for some targets, notably ARMv6-M. Fixes rust-lang/compiler-builtins#150
diff --git a/src/llvm b/src/llvm
@@ -1 +1 @@
-Subproject commit 8e1e6e6ff18a24b417a5ec3254bb111b8a9b4713
+Subproject commit d8c9dfcc4f5289c09bab5736966feee2a0e69594
