Auto merge of #43976 - dylanmckay:update-builtins, r=alexcrichton

bors · bors · commit fe895bfb90bd · 2017-08-20T09:39:12.000Z
Update the compiler_builtins submodule Fixes #43411
diff --git a/src/libcompiler_builtins b/src/libcompiler_builtins
@@ -1 +1 @@
-Subproject commit 5e49856003f33aa5781a0edca148be21025e18e7
+Subproject commit 6b9281d2b2f0ebb94838814b1e8ace2de4b7035b
