message: Update bazel-toolchains repo to use Bazel 0.5.4 toolchain configs.
diff: @@ -699,9 +699,9 @@ def tf_workspace(path_prefix="", tf_repo_name=""):
  native.http_archive(
  name = "bazel_toolchains",
  urls = [
  - "http://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/bccee4855c049d34bac481083b4c68e2fab8cc50.tar.gz",
  - "https://github.com/bazelbuild/bazel-toolchains/archive/bccee4855c049d34bac481083b4c68e2fab8cc50.tar.gz",
  + "http://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/9dbd803ad3b9447430a296810197b09b3a710956.tar.gz",
  + "https://github.com/bazelbuild/bazel-toolchains/archive/9dbd803ad3b9447430a296810197b09b3a710956.tar.gz",
  ],
  - sha256 = "3903fd93b96b42067e00b7973a2c16c34e761ad7a0b55e1557d408f352849e41",
  - strip_prefix = "bazel-toolchains-bccee4855c049d34bac481083b4c68e2fab8cc50",
  + sha256 = "0799aa12db5260a499beb40f81744e760c59d055bfc5d271dd2c2ed4d5419faa",
  + strip_prefix = "bazel-toolchains-9dbd803ad3b9447430a296810197b09b3a710956",
  )
  