Rephrase chainerx_cc README
Rephrase chainerx_cc README

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