message: Integrate LLVM at llvm/llvm-project@b2b7dbb47aa9
  Updates LLVM usage to match
  [b2b7dbb47aa9](https://github.com/llvm/llvm-project/commit/b2b7dbb47aa9)
diff: @@ -712,8 +712,8 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  )
  # Check out LLVM and MLIR from llvm-project.
  - LLVM_COMMIT = "0de60b550b727fa3a0202a9ab5ca30520e291dd5"
  - LLVM_SHA256 = "d23a64cca502c32aa3990b5252f19cb2ad59534084384df6d7a355e6f23fac62"
  + LLVM_COMMIT = "b2b7dbb47aa9aff1252d4440bb9986df5a7e67cb"
  + LLVM_SHA256 = "1e26635eb360b81f75304d172a6eea50ea5a55a42fd21a35b973321b32df69e9"
  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),
  