Integrate LLVM at https://github.com/llvm/llvm-project/commit/4f6c4b473c4a

PiperOrigin-RevId: 317278388

SUBMODULE_VERSIONS

diff --git a/SUBMODULE_VERSIONS b/SUBMODULE_VERSIONS
index 6721473..1e5e91d 100644
--- a/SUBMODULE_VERSIONS
+++ b/SUBMODULE_VERSIONS
@@ -3,7 +3,7 @@
 4c13807b7d43ff0946b7ffea0ae3aee9e611d778 third_party/dear_imgui
 a5d9d0f7d368054fd1691aedf1db4116efcc233e third_party/flatbuffers
 f2fb48c3b3d79a75a88a99fba6576b25d42ec528 third_party/googletest
-7f0d7f32631648acf48bc23047635ab5e2058a1a third_party/llvm-project
+4f6c4b473c4a57ec597a201dee483204454c8a6d third_party/llvm-project
 17b12a4481daa150e2d1ea3ada086b551b856707 third_party/marl
 67f3ccebee84f3488b46a8d3ac005178c52ff264 third_party/mlir-emitc
 80d452484c5409444b0ec19383faa84bb7a4d351 third_party/pybind11