message: Update TF workspace to only use bazel mirror.
diff: @@ -551,7 +551,7 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  sha256 = "47a5cb24209c24370cd4fec7bfbda8b40d5660b3c821addcfb47a405a077eee9",
  strip_prefix = "llvm-project-ecc999101aadc8dc7d4af9fd88be10fe42674aa0/llvm",
  urls = [
  - "https://mirror.bazel.build/github.com/llvm/llvm-project/archive/ecc999101aadc8dc7d4af9fd88be10fe42674aa0.tar.gz",
  + "https://storage.googleapis.com/mirror.tensorflow.org/github.com/llvm/llvm-project/archive/ecc999101aadc8dc7d4af9fd88be10fe42674aa0.tar.gz",
  "https://github.com/llvm/llvm-project/archive/ecc999101aadc8dc7d4af9fd88be10fe42674aa0.tar.gz",
  ],
  )
  @@ -904,7 +904,7 @@ def tf_repositories(path_prefix = "", tf_repo_name = ""):
  tf_http_archive(
  name = "pybind11",
  urls = [
  - "https://mirror.bazel.build/github.com/pybind/pybind11/archive/v2.3.0.tar.gz",
  + "https://storage.googleapis.com/mirror.tensorflow.org/github.com/pybind/pybind11/archive/v2.3.0.tar.gz",
  "https://github.com/pybind/pybind11/archive/v2.3.0.tar.gz",
  ],
  sha256 = "0f34838f2c8024a6765168227ba587b3687729ebf03dc912f88ff75c7aa9cfe8",
  