Add test to verify uniform matrix upload
Add test to verify uniform matrix upload

Bug: angleproject:3198
Change-Id: Icb63d036a756b849c44d36342c7ba2fc2db0f910
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1604069
Commit-Queue: Shahbaz Youssefi <582eeec4f08a2ccd61e3ef52115e6e7c571582de@chromium.org>
Reviewed-by: Tobin Ehlis <c15ba1c6ec8841cd136fafb26b333b1f76c86fb4@google.com>

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