apt: 1.0.9.4

also add xz do depends.
This is a actually a dependency of pacman (with libarchive)
so everybody does have to have it installed.
However, namcap complains..
python-rtslib-fb: 2.1.fb51
python2-rtslib-fb: delete (now in python-rtslib-fb)
targetcli-fb: 2.1.fb38

raised the rtslib dep to >=fb51
due to api changes