adjust mtab and localmount dependencies

localmount had mtab in its "use" dependencies; however, it makes more
sense to add "before localmount" to the mtab service and remove
"use mtab" from the localmount service.

init.d/localmount.in

@@ -14,7 +14,7 @@ description="Mounts disks and swap according to /etc/fstab."
 depend()
 {
 	need fsck
-	use lvm modules mtab root
+	use lvm modules root
 	after clock lvm modules root
 	keyword -docker -jail -lxc -prefix -systemd-nspawn -vserver
 }

init.d/mtab.in

@@ -14,6 +14,7 @@ description="Update /etc/mtab to match what the kernel knows about"
 depend()
 {
 	after clock
+	before localmount
 	need root
 	keyword -prefix -systemd-nspawn
 }