Fix Caffe SoftmaxLayer's old name.
Fix Caffe SoftmaxLayer's old name.

wkentaro/chainer,hvy/chainer,hvy/chainer,okuta/chainer,cupy/cupy,delta2323/chainer,niboshi/chainer,anaruse/chainer,cupy/cupy,keisuke-umezawa/chainer,chainer/chainer,cupy/cupy,keisuke-umezawa/chainer,benob/chainer,pfnet/chainer,jnishi/chainer,kikusu/chainer,hvy/chainer,jnishi/chainer,benob/chainer,chainer/chainer,ktnyt/chainer,wkentaro/chainer,kikusu/chainer,wkentaro/chainer,rezoo/chainer,wkentaro/chainer,ysekky/chainer,tkerola/chainer,ktnyt/chainer,ktnyt/chainer,chainer/chainer,kashif/chainer,okuta/chainer,niboshi/chainer,okuta/chainer,keisuke-umezawa/chainer,ronekko/chainer,aonotas/chainer,cupy/cupy,hvy/chainer,ktnyt/chainer,keisuke-umezawa/chainer,okuta/chainer,niboshi/chainer,chainer/chainer,niboshi/chainer,kiyukuta/chainer,jnishi/chainer,jnishi/chainer