glsl: set uses texture gather directly in shader_info

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/compiler/glsl/ir_set_program_inouts.cpp

@@ -416,7 +416,7 @@ ir_visitor_status
 ir_set_program_inouts_visitor::visit_enter(ir_texture *ir)
 {
    if (ir->op == ir_tg4)
-      prog->UsesGather = true;
+      prog->info.uses_texture_gather = true;
    return visit_continue;
 }
 

src/compiler/shader_info.c

@@ -29,6 +29,4 @@ copy_shader_info(const struct gl_shader_program *shader_prog,
                  struct gl_linked_shader *sh)
 {
    shader_info *info = &sh->Program->info;
-
-   info->uses_texture_gather = sh->Program->UsesGather;
 }