Fixed training, calculation mAP and anchors for Yolo v3

AlexeyAB

2018-03-28 3fc3fd0f1f1924acb7195fe98fe68648e4056a09

 src/network_kernels.cu

@@ -121,7 +121,7 @@
   }
#endif
    forward_network_gpu(net, state);
   cudaStreamSynchronize(get_cuda_stream());
   //cudaStreamSynchronize(get_cuda_stream());
    backward_network_gpu(net, state);
}