Add parameter size for LayerNormalization
Add parameter size for LayerNormalization

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