Update LLVM

diff --git a/src/llvm-project b/src/llvm-project
index 833dd1e3d4fd350c7c9f6fb2ce0c5f16af7a1e21..a78defc24c73930246db65fcabbca86a3df684c4 160000 (submodule)
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 833dd1e3d4fd350c7c9f6fb2ce0c5f16af7a1e21
+Subproject commit a78defc24c73930246db65fcabbca86a3df684c4