init-live.sh depends on udev performing automounting, which happens in
udev-extraconf. Explicitly depend on it so that we always have it installed.
(From OE-Core rev: a608d74e69ca1efe5f2b176c000fb8212797d056)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>