Add ChainerX files to MANIFEST.in
Add ChainerX files to MANIFEST.in

niboshi/chainer,jnishi/chainer,jnishi/chainer,okuta/chainer,ktnyt/chainer,tkerola/chainer,okuta/chainer,niboshi/chainer,hvy/chainer,jnishi/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,okuta/chainer,niboshi/chainer,ktnyt/chainer,ktnyt/chainer,keisuke-umezawa/chainer,chainer/chainer,hvy/chainer,hvy/chainer,wkentaro/chainer,keisuke-umezawa/chainer,ktnyt/chainer,chainer/chainer,chainer/chainer,niboshi/chainer,hvy/chainer,wkentaro/chainer,keisuke-umezawa/chainer,wkentaro/chainer,jnishi/chainer,pfnet/chainer,keisuke-umezawa/chainer