abrtd: recreate Dump Location directory if it is delete

- add inotify watch IN_DELETE_SELF and IN_MOVE_SELF and as a rection on
these events create the dump location and restore inotify watch.

- closes #624

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Signed-off-by: Jiri Moskovcak <jmoskovc@redhat.com>