message: Enable template specification for ScatterMax/Min on gpu
diff: @@ -41,6 +41,7 @@ typedef Eigen::GpuDevice GPUDevice;
  DEFINE_GPU_SPECS_INDEX(T, int32); \
  DEFINE_GPU_SPECS_INDEX(T, int64);
  +DEFINE_GPU_SPECS(Eigen::half);
  DEFINE_GPU_SPECS(float);
  DEFINE_GPU_SPECS(double);
  // TODO: The following fails to compile.
  