glsl: Pass variable mode into ast_process_structure_or_interface_block().

Later patches will use this information to do proper error checking of
interpolation qualifiers that appear inside of interface blocks.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
1 file changed