message: Integrate LLVM at llvm/llvm-project@a4fa667dee60
  Updates LLVM usage to match
  [a4fa667dee60](https://github.com/llvm/llvm-project/commit/a4fa667dee60)
diff: @@ -685,8 +685,8 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  )
  # Check out LLVM and MLIR from llvm-project.
  - LLVM_COMMIT = "a1a1d338e99dc9c6d1234b70f43dea2e1bb2f8ce"
  - LLVM_SHA256 = "0adf75d405fe714b2c8a0ab1db4c10dcf9629b57e001191d3e5520407d563cc5"
  + LLVM_COMMIT = "a4fa667dee6012e350bd405ee7a759a53738b279"
  + LLVM_SHA256 = "11ef06ff3c01638d3bd11d9095259db92ab69ec85f101f4969c6c4ad9f154f8e"
  LLVM_URLS = [
  "https://storage.googleapis.com/mirror.tensorflow.org/github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
  "https://github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT),
  