glsl: rename is_record() -> is_struct()

Replace was done using:
find ./src -type f -exec sed -i -- \
's/is_record(/is_struct(/g' {} \;

Acked-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>

src/compiler/glsl/glsl_parser_extras.cpp

@@ -940,7 +940,7 @@ _mesa_ast_set_aggregate_type(const glsl_type *type,
       }
 
    /* If the aggregate is a struct, recursively set its fields' types. */
-   } else if (type->is_record()) {
+   } else if (type->is_struct()) {
       exec_node *expr_node = ai->expressions.get_head_raw();
 
       /* Iterate through the struct's fields. */