message: [builder_darwin] Decode a version bytes object as a string
diff: @@ -46,7 +46,7 @@ def construct_triple(platform_name, architecture):
  # Grab the current SDK version number, which will be used in the triple.
  version_output = subprocess.check_output(
  - ["xcrun", "--sdk", sdk_name, "--show-sdk-version"]).rstrip()
  + ["xcrun", "--sdk", sdk_name, "--show-sdk-version"]).rstrip().decode('utf-8')
  if version_output is None:
  return None
  