message: Include correct header for std::array
diff: @@ -23,6 +23,8 @@ limitations under the License.
  #include "tensorflow/core/framework/tensor_shape.h"
  #include "tensorflow/core/platform/types.h"
  +#include <array>
  +
  // 'tensorflow' namespace is used so that int64 and other types don't require
  // qualification.
  namespace tensorflow {
  