message: Integrate LLVM at llvm/llvm-project@557d2ade016f
  Updates LLVM usage to match
  [557d2ade016f](https://github.com/llvm/llvm-project/commit/557d2ade016f)
diff: @@ -4,8 +4,8 @@ load("//third_party:repo.bzl", "tf_http_archive")
  def repo(name):
  """Imports LLVM."""
  - LLVM_COMMIT = "12edddafac451cb39b923dd0883794f554fc9616"
  - LLVM_SHA256 = "32efd0de948cdf5504fd4117d244cc70e1604149673b0d752faf1b3e9191cc26"
  + LLVM_COMMIT = "557d2ade016f3e228e90aab317b94f804e0bc1cd"
  + LLVM_SHA256 = "7bf513f0f0ef6c3444d10572e10ed98c101992774e9aee707a10faa08b2c3763"
  tf_http_archive(
  name = name,
  