Work around glslang's improved validation by using a valid but very
high layout binding. This should be more robust.

Tests already passing:
dEQP-GLES2.functional.state_query.shader.uniform_value_sampler

Bug: angleproject:2691
Bug: angleproject:2612
Bug: angleproject:2600
Change-Id: Ie78ae89f76cc0a42806724b622d7f201241bd041
Reviewed-on: https://chromium-review.googlesource.com/1117477Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>