message: Explicitly import tools/bazel.rc
  To fix build with Bazel 0.19.0 or later and it won't break build with old version or Bazel
  Fixes
diff: @@ -1555,6 +1555,9 @@ def main():
  check_bazel_version('0.15.0')
  reset_tf_configure_bazelrc()
  + # Explicitly import tools/bazel.rc, this is needed for Bazel 0.19.0 or later
  + write_to_bazelrc('import %workspace%/tools/bazel.rc')
  +
  cleanup_makefile()
  setup_python(environ_cp)
  