esp8266/modmachine: Timer: Add ONE_SHOT and PERIODIC symbolic constants.

esp8266/modmachine.c

@@ -100,6 +100,8 @@ STATIC const mp_map_elem_t esp_timer_locals_dict_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&esp_timer_deinit_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&esp_timer_init_obj },
 //    { MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&esp_timer_callback_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ONE_SHOT), MP_OBJ_NEW_SMALL_INT(false) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_PERIODIC), MP_OBJ_NEW_SMALL_INT(true) },
 };
 STATIC MP_DEFINE_CONST_DICT(esp_timer_locals_dict, esp_timer_locals_dict_table);
 

esp8266/qstrdefsport.h

@@ -155,3 +155,5 @@ Q(deinit)
 Q(init)
 Q(mode)
 Q(period)
+Q(ONE_SHOT)
+Q(PERIODIC)