Fixes spectral normalization chainerx conversion
Fixes spectral normalization chainerx conversion

okuta/chainer,wkentaro/chainer,wkentaro/chainer,niboshi/chainer,niboshi/chainer,wkentaro/chainer,chainer/chainer,chainer/chainer,hvy/chainer,pfnet/chainer,okuta/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,hvy/chainer,niboshi/chainer,hvy/chainer,hvy/chainer,niboshi/chainer,chainer/chainer,okuta/chainer