message: install package add abseil for grpc support
diff: @@ -37,9 +37,10 @@ REQUIRED_PACKAGES = [
  'gast >= 0.2.0',
  'numpy >= 1.12.1',
  'six >= 1.10.0',
  - 'protobuf >= 3.4.0',
  + 'protobuf >= 3.5.0',
  'tensorflow-tensorboard >= 0.4.0',
  'termcolor >= 1.1.0',
  + 'absl-py >= 0.1.9'
  ]
  project_name = 'tensorflow'
  