message: Integrate LLVM at llvm/llvm-project@8f7f2c4211ca
  Updates LLVM usage to match
  [8f7f2c4211ca](https://github.com/llvm/llvm-project/commit/8f7f2c4211ca)
diff: @@ -685,8 +685,8 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  )
  # Check out LLVM and MLIR from llvm-project.
  - LLVM_COMMIT = "68f66f37d7d74be7beba56506c4397dadc8538dd"
  - LLVM_SHA256 = "7c8940467bb5ac464eba5a0c1ca097536ab8e6e0906be31c7038cf1c1b28ab03"
  + LLVM_COMMIT = "8f7f2c4211caf724e8319976968995bec1894b96"
  + LLVM_SHA256 = "b66bc278f2cb70594a7de1e0ee2eecdeab08f57265feb2dfc9e9603352c142ec"
  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),
  