Update exclude pattern of pep8
Update exclude pattern of pep8

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