UpdateSubresource and CopySubresource cannot copy to depth stencil textures
in feature level 10.0.

BUG=angleproject:1572

Change-Id: Ic9f8cbfb2c69de8502da7df34f1c5935144a9387
Reviewed-on: https://chromium-review.googlesource.com/402554
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>