Add more test cases for bindImageTexture
Add more test cases for bindImageTexture

Add cases that bindImageTexture binds a single layer of a
two-dimensional array, three-dimensional, or cube map texture.

BUG=angleproject:1987
TEST=angle_end2end_tests.ComputeShaderTest.*

Change-Id: I75883ef05c509100e5164a5add69167a41203101
Reviewed-on: https://chromium-review.googlesource.com/856320
Commit-Queue: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Reviewed-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle