Enable strides_check in test_diag
Enable strides_check in test_diag

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