message: Add header guard to lstm_utils.
diff: @@ -12,6 +12,9 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  +#ifndef TENSORFLOW_CONTRIB_LITE_TOCO_GRAPH_TRANSFORMATIONS_LSTM_UTILS_H_
  +#define TENSORFLOW_CONTRIB_LITE_TOCO_GRAPH_TRANSFORMATIONS_LSTM_UTILS_H_
  +
  #include <iostream>
  #include <string>
  #include <vector>
  @@ -100,3 +103,5 @@ bool GetMatchingRnnArray(Model* model, const string& back_edge_source_array,
  string* rnn_array);
  } // namespace toco
  +
  +#endif // TENSORFLOW_CONTRIB_LITE_TOCO_GRAPH_TRANSFORMATIONS_LSTM_UTILS_H_
  