Update LLVM submodule

diff --git a/src/llvm-project b/src/llvm-project
index 5f67a5715771b7d29e4713e8d68338602d216dcf..39c5555872cc5d379cc3535a31dc0cdac969466f 160000 (submodule)
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 5f67a5715771b7d29e4713e8d68338602d216dcf
+Subproject commit 39c5555872cc5d379cc3535a31dc0cdac969466f