mrom_build_all.sh: fix dev-host uploading

* It uploaded files to wrong folders because of device variants
ubuntu-touch-build/build.sh: update
mrom_build_all.sh: replace "true" and "false" with actual booleans
mrom_build_all.sh: fix recovery_patch=* argument
mrom_update_xda.py: added, script for updating MultiROM's XDA threads
mrom_build_all.sh: update XDA threads after build