temp/wlroots: copy to sxmo-wlroots to override the fork in stable

sxmo-wlroots was installed from aports 3.15 when pmOS v21.12 was released. As such, apk always looks for a package named sxmo-wlroots to satisfy the wlroots dependancy while sxmo-wlroots is in 3.15.

This patch copies the contents of the latest required wlroots into sxmo-wlroots so that users dont have to deal with outdated library on the latest service pack 2. Moreover, apk wont complain about sxmo-wlroots doesnt exist resulting in broken installs and manual intervention.