add xdg-user-dirs to automatically create xdg user dirs
This patch is meant to support https://git.sr.ht/~mil/sxmo-utils/commit/46cc06b
Which in turn should fix https://todo.sr.ht/~mil/sxmo-tickets/350 and postmarketOS/megapixels#46
This patch is not in the current release of sxmo but I am adding it so that when 1.9.0 is released, we dont have to deal with this bug again.