glsl: add AoA support for atomic counters

glsl: add AoA support for atomic counters

This marks all counters in an AoA as active.

For AoA all but the innermost array are treated as separate
counters/uniforms. The Nvidia binary also goes further and
finds inactive counters in the AoA, in future we should do
this too, however this gets things working for the time being.

This change also removes the use of UniformHash for atomic counters,
this avoids having to generate name strings used as hash keys.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>