Added automatic AVX support - speedup +20% on CPU x86_64 Intel Skylake

AlexeyAB

2018-04-06 2a9f7e44ce1b73d3d56ef83f83e94f074ecac3f9

 src/yolo_v2_class.cpp

@@ -69,6 +69,7 @@
   }
   set_batch_network(&net, 1);
   net.gpu_index = cur_gpu_id;
   fuse_conv_batchnorm(net);

   layer l = net.layers[net.n - 1];
   int j;