systemd: select fsck wrapper from util-linux

systemd: select fsck wrapper from util-linux

Select the fsck required by systemd provided by util-linux. This
prevents ending up with fsck from busybox, which is incompatible
with systemd.

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 3fddb73ffd17f8a8f701f780e3c28a0f70f45da4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>