message: Integrate LLVM at llvm/llvm-project@104a9f99ccab
  Updates LLVM usage to match
  [104a9f99ccab](https://github.com/llvm/llvm-project/commit/104a9f99ccab)
diff: @@ -685,8 +685,8 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  )
  # Check out LLVM and MLIR from llvm-project.
  - LLVM_COMMIT = "78036360573c35ea9e6a697d2eed92db893b4850"
  - LLVM_SHA256 = "2d126650757c0007ce978d6bafea77c821614084b2bb7b94c39109ab34f750aa"
  + LLVM_COMMIT = "104a9f99ccab9d6dbc07a70f569246c23feaf4c1"
  + LLVM_SHA256 = "7e1dde466fca679524d5f5152f36a292b00d23bb351f71c1f8143f32c59a1acb"
  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),
  