GLES doesn't require any implementation-specified alignment requirement
for atomic counter buffers.  They are emulated with Vulkan storage
buffers, which do have restrictions.

The storage buffers are bound at aligned offsets, and the remaining
offsets are passed to the shader as uniform values.  This means that the
driver uniforms are now also bound to the compute pipeline.

Bug: angleproject:3566
Change-Id: I1a3429438f76d95e33cb5c6ef2c9370a10d900d6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1713095
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>