Add support for fc18 and rawhide
Create mtab softlink

On newer fc, /etc/mtab is no longer file but link to /proc/mounts.
Because appliance-creator is not able to handle this change,
74-quest_apply_hacks_running was added. This script is executed AFTER
start of all nodes and finds out, if /etc/mtab contains root (/) item or
not. If not, create /etc/mtab link.