Added cusolver to CMakeLists
Added cusolver to CMakeLists

(cherry picked from commit df5e348bd5d8af213eb39410ec5868026aeb6aa2)

wkentaro/chainer,niboshi/chainer,chainer/chainer,niboshi/chainer,pfnet/chainer,niboshi/chainer,wkentaro/chainer,hvy/chainer,okuta/chainer,wkentaro/chainer,chainer/chainer,chainer/chainer,okuta/chainer,hvy/chainer,okuta/chainer,niboshi/chainer,okuta/chainer,hvy/chainer,chainer/chainer,hvy/chainer,wkentaro/chainer