With dynamic shaders we may have multiple shader executables per
program binary. We must store the uniforms outside the executable,
in the program binary, to be consistent between variations.

Change-Id: I1bec83dfb83ee9bb422448b157338a46e8e7ba56
Reviewed-on: https://chromium-review.googlesource.com/183585Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>