glsl: fix names in lower_constant_arrays_to_uniforms

glsl: fix names in lower_constant_arrays_to_uniforms

Patch changes lowering pass to use unique name for each uniform
so that arrays from different stages cannot end up having same
name.

v2: instead of global counter, use pointer to achieve
    unique name (Kenneth Graunke)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89590
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: 10.5 10.4 <mesa-stable@lists.freedesktop.org>