Updated to CUDA 9.1. And fixed no_gpu dependecies.

AlexeyAB

2018-02-23 cd2bdec09030edf7da79ecdeb38d908c106850b3

 src/detection_layer.c

@@ -59,7 +59,7 @@
            for (i = 0; i < locations; ++i) {
                int offset = i*l.classes;
                softmax(l.output + index + offset, l.classes, 1,
                        l.output + index + offset);
                        l.output + index + offset, 1);
            }
        }
    }