message: Integrate LLVM at llvm/llvm-project@4c973ae51b85
  Updates LLVM usage to match
  [4c973ae51b85](https://github.com/llvm/llvm-project/commit/4c973ae51b85)
diff: @@ -4,8 +4,8 @@ load("//third_party:repo.bzl", "tf_http_archive")
  def repo(name):
  """Imports LLVM."""
  - LLVM_COMMIT = "df6d0579e18e868ef4b6e97794eacd5af86e1b8a"
  - LLVM_SHA256 = "badaf6e0e5331669a7d572e0c45f2ed611629e9340a0212e891acbd29730f069"
  + LLVM_COMMIT = "4c973ae51b859dca9792e1ad87a6673c49815a8d"
  + LLVM_SHA256 = "b8bdb45cd65c949eaff5d578f79d1a25a530add079a27b2cbc3b26964e2bfa63"
  tf_http_archive(
  name = name,
  