message: Add grpcio as a pip dependency of tensorflow
diff: @@ -35,6 +35,7 @@ REQUIRED_PACKAGES = [
  'absl-py >= 0.1.6',
  'astor >= 0.6.0',
  'gast >= 0.2.0',
  + 'grpcio >= 1.8.6',
  'numpy >= 1.12.1',
  'six >= 1.10.0',
  'protobuf >= 3.4.0',
  