Some fixes for AVX support on CPU

AlexeyAB

2018-08-13 f92b20580a21663c5db9eb8608f8cabd7adbeb10

 src/avgpool_layer.h

@@ -2,9 +2,9 @@
#define AVGPOOL_LAYER_H

#include "image.h"
#include "params.h"
#include "cuda.h"
#include "layer.h"
#include "network.h"

typedef layer avgpool_layer;