Use non-contiguous arrays for Array::Sum test
Use non-contiguous arrays for Array::Sum test

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