update submodules
diff --git a/llvm b/llvm
index f976cf4..8187a5b 160000
--- a/llvm
+++ b/llvm
@@ -1 +1 @@
-Subproject commit f976cf4cca0794267f28b54e468007fd476d37d9
+Subproject commit 8187a5bc6dfc41b2fdfd91ebd7e216bb2594eeba