maxpool_layer on CPU uses AVX2 and OpenMP

AlexeyAB

2018-08-21 8436251a05ec0cfa906089ee022db17498e6f65f

 src/layer.h

@@ -181,6 +181,7 @@

    char *align_bit_weights;
    float *mean_arr;
    int lda_align;

    float *col_image;
    int   * input_layers;