Rollup merge of rust-lang#44387 - est31:update_compiler_builtins, r=Mark-Simulacrum

GuillaumeGomez · web-flow · commit 06f39fa10e70 · 2017-09-10T14:03:26.000+02:00
Update the libcompiler_builins submodule Pulls in rust-lang/compiler-builtins#187 for nicer build output :)
diff --git a/src/libcompiler_builtins b/src/libcompiler_builtins
@@ -1 +1 @@
-Subproject commit 6b9281d2b2f0ebb94838814b1e8ace2de4b7035b
+Subproject commit 38ffaf97aa418cc369ca0197a72a0b927cc0f622
