Update llvm to pull in various backports

TimNN · TimNN · commit 16ad2c8fad3f · 2017-05-04T08:12:17.000+02:00
diff --git a/src/llvm b/src/llvm
@@ -1 +1 @@
-Subproject commit 15745af7683844e43bdec966072b8e7b44772450
+Subproject commit cf85b5a8da7853c4de5cc57766da8b7988c06461
