The best way is to dowel and re-drill, and if you have the time, that is what I would do. If you are in a rush, toothpicks (or wooden matches) will work, though. However, I would not let the glue dry first. Reattach the button right after filling the hole with glue and toothpicks. Also, if you have white glue on hand, just use that. It's not worth making a special trip to the store to buy wood glue. It is unnecessary for this application. All it is is white glue with better temperature and moisture resistance – neither of which are needed for this use. I would not suggest super glue. It's a difficult product to work with. It's runny, it dries too fast, it's all crusty looking when it dries, and it's more difficult to clean up the squeezeout cleanly. Besides, it's overkill. AR glues (white glue or wood glue) are plenty strong.