message: Reduce Kokoro log output by 83%
  Winconsistent-missing-override caused this macro to output 1.5MB of
  linter warnings, since it's expanded 45 times and included by 51 .cc
  files.
diff: @@ -108,7 +108,7 @@ void RunGraphTransformations(Model* model, const string& message,
  class GTName : public GraphTransformation { \
  public: \
  bool Run(Model* model, std::size_t op_index) override; \
  - const char* Name() const { return #GTName; } \
  + const char* Name() const override { return #GTName; } \
  };
  // List of all graph transformations
  