fix format

test=develop

paddle/fluid/operators/activation_op.cc

@@ -12,10 +12,10 @@ 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. */
 
-#include <memory>
-#include <unordered_map>
 #include "paddle/fluid/operators/activation_op.h"
+#include <memory>
 #include <string>
+#include <unordered_map>
 #include "paddle/fluid/operators/mkldnn/mkldnn_activation_op.h"
 #include "paddle/fluid/platform/port.h"
 #ifdef PADDLE_WITH_CUDA