glsl: Split process_block_array into two functions

glsl: Split process_block_array into two functions

One for the array parts and one for the leaf members.  This will
simplify later changes.

The indentation is wonkey after this patch.  This was done to make it
more obvious that the function is just getting split.  The next patch
will fix the indentation.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>