py: Add framework for built-in "type()" function.
diff --git a/py/builtin.h b/py/builtin.h
index 2d95e3a..9806624 100644
--- a/py/builtin.h
+++ b/py/builtin.h
@@ -31,3 +31,4 @@
 mp_obj_t mp_builtin_range(int n_args, const mp_obj_t *args);
 MP_DECLARE_CONST_FUN_OBJ(mp_builtin_set_obj);
 mp_obj_t mp_builtin_sum(int n_args, const mp_obj_t *args);
+MP_DECLARE_CONST_FUN_OBJ(mp_builtin_type_obj);