Integrate llvm/llvm-project@395f9ce30e88 (2023-12-16) (#15954)

diff --git a/third_party/llvm-project b/third_party/llvm-project
index 98a578e..395f9ce 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit 98a578e6469bfa5dbf11abaa5edd8c008fbb94ad
+Subproject commit 395f9ce30e884cb6ce02f7a3bdd0dd1f72ea9033