Add missing attr.gpu decorator
Add missing attr.gpu decorator

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