Integrate LLVM at llvm/llvm-project@e2e1a78abcef

Updates LLVM usage to match
[e2e1a78abcef](https://github.com/llvm/llvm-project/commit/e2e1a78abcef)

PiperOrigin-RevId: 374360199
Change-Id: If36c53e180ee06f857d25176321b47091dfb2f72
diff --git a/third_party/llvm/workspace.bzl b/third_party/llvm/workspace.bzl
index e3cfd40..74311be 100644
--- a/third_party/llvm/workspace.bzl
+++ b/third_party/llvm/workspace.bzl
@@ -4,8 +4,8 @@
 
 def repo(name):
     """Imports LLVM."""
-    LLVM_COMMIT = "ab5ff154abe59d04f77035587c6a169c15168b2f"
-    LLVM_SHA256 = "b2e529d6a3c9533c91b15ce1dba19d419f671ea576fcc6329fe1a5d34fbc867b"
+    LLVM_COMMIT = "e2e1a78abcefb396ea1c08990f4cf20ae5068ef8"
+    LLVM_SHA256 = "e1d0682790c8ed155681cb877f44a6632bd3ae708168022fc1dd629f4d5d7a20"
 
     tf_http_archive(
         name = name,