Integrate LLVM at llvm/llvm-project@abb5dd6e99df

Updates LLVM usage to match
[abb5dd6e99df](https://github.com/llvm/llvm-project/commit/abb5dd6e99df)

PiperOrigin-RevId: 416152309
Change-Id: I0929bd1381a85d219fc99b7aff12a83dfc967f8c
diff --git a/third_party/llvm/workspace.bzl b/third_party/llvm/workspace.bzl
index 64c0bf7..96f0755 100644
--- a/third_party/llvm/workspace.bzl
+++ b/third_party/llvm/workspace.bzl
@@ -4,8 +4,8 @@
 
 def repo(name):
     """Imports LLVM."""
-    LLVM_COMMIT = "fc02ceb12aedeb43a993eac8226700810638e455"
-    LLVM_SHA256 = "52517d5f5ee257da5c6c330b55081c18c070b32e195ee52e259ea2c18d7b8442"
+    LLVM_COMMIT = "abb5dd6e99df623effc935b84e86f2e886580ad7"
+    LLVM_SHA256 = "09cbaa37375c1749a6e2a7c9789f24cbb288907db53bc600dd6187c614818baf"
 
     tf_http_archive(
         name = name,