Add cpplint on circleci
Add cpplint on circleci

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