Fix setattr of FunctionSet
Fix setattr of FunctionSet

tkerola/chainer,hvy/chainer,1986ks/chainer,ktnyt/chainer,ronekko/chainer,jfsantos/chainer,yanweifu/chainer,cupy/cupy,truongdq/chainer,hvy/chainer,jnishi/chainer,ktnyt/chainer,tigerneil/chainer,AlpacaDB/chainer,ktnyt/chainer,jnishi/chainer,kikusu/chainer,okuta/chainer,keisuke-umezawa/chainer,wkentaro/chainer,bayerj/chainer,benob/chainer,kashif/chainer,cupy/cupy,sinhrks/chainer,delta2323/chainer,okuta/chainer,elviswf/chainer,niboshi/chainer,tereka114/chainer,woodshop/chainer,nushio3/chainer,cupy/cupy,chainer/chainer,ttakamura/chainer,muupan/chainer,ikasumi/chainer,okuta/chainer,kiyukuta/chainer,Kaisuke5/chainer,keisuke-umezawa/chainer,rezoo/chainer,ytoyama/yans_chainer_hackathon,cupy/cupy,truongdq/chainer,masia02/chainer,wkentaro/chainer,laysakura/chainer,sou81821/chainer,sinhrks/chainer,wkentaro/chainer,keisuke-umezawa/chainer,pfnet/chainer,hidenori-t/chainer,niboshi/chainer,aonotas/chainer,minhpqn/chainer,chainer/chainer,okuta/chainer,niboshi/chainer,muupan/chainer,chainer/chainer,hvy/chainer,t-abe/chainer,kuwa32/chainer,wavelets/chainer,AlpacaDB/chainer,t-abe/chainer,ktnyt/chainer,benob/chainer,cemoody/chainer,wkentaro/chainer,chainer/chainer,umitanuki/chainer,jnishi/chainer,niboshi/chainer,ttakamura/chainer,jnishi/chainer,hvy/chainer,anaruse/chainer,ysekky/chainer,keisuke-umezawa/chainer,nushio3/chainer,kikusu/chainer,woodshop/complex-chainer,tscohen/chainer