Addressed thaink's comments

tensorflow/lite/kernels/internal/reference/transpose.h

@@ -1,3 +1,20 @@
+/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+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_LITE_KERNELS_INTERNAL_REFERENCE_REFERENCE_OPS_H_
+#define TENSORFLOW_LITE_KERNELS_INTERNAL_REFERENCE_REFERENCE_OPS_H_
+
 #include "tensorflow/lite/kernels/internal/common.h"
 #include "tensorflow/lite/kernels/internal/types.h"
 
@@ -90,3 +107,5 @@ void Transpose(const TransposeParams& params,
 
 }  // namespace reference_ops
 }  // namespace tflite
+
+#endif  // TENSORFLOW_LITE_KERNELS_INTERNAL_REFERENCE_REFERENCE_OPS_H_