Update submodule llvm to get LVI bugfix

diff --git a/src/llvm-project b/src/llvm-project
index e8b556b6a8836147429abe391d6ed18806867b45..3adf16e0cb1a0d9d7216883ac47857a6d1ee6581 160000 (submodule)
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit e8b556b6a8836147429abe391d6ed18806867b45
+Subproject commit 3adf16e0cb1a0d9d7216883ac47857a6d1ee6581