Fixed the condition for the switching of cuDNN.
Fixed the condition for the switching of cuDNN.

The deterministic algorithm of cuDNN is incompatible with dilated convolution.

okuta/chainer,okuta/chainer,keisuke-umezawa/chainer,ktnyt/chainer,hvy/chainer,pfnet/chainer,wkentaro/chainer,tkerola/chainer,chainer/chainer,chainer/chainer,ktnyt/chainer,jnishi/chainer,ktnyt/chainer,keisuke-umezawa/chainer,jnishi/chainer,niboshi/chainer,niboshi/chainer,jnishi/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,chainer/chainer,niboshi/chainer,rezoo/chainer,ktnyt/chainer,okuta/chainer,hvy/chainer,jnishi/chainer,hvy/chainer,keisuke-umezawa/chainer,okuta/chainer,chainer/chainer,wkentaro/chainer,wkentaro/chainer,keisuke-umezawa/chainer