force root to be rw before localmount

The original service that pulled in root remount was mtab which
is not part of OpenRC.

This fixes #449.

init.d/localmount.in

@@ -13,9 +13,9 @@ description="Mounts disks and swap according to /etc/fstab."
 
 depend()
 {
-	need fsck
-	use lvm modules root
-	after clock lvm modules root
+	need fsck root
+	use lvm modules
+	after clock lvm modules
 	keyword -docker -jail -lxc -prefix -systemd-nspawn -vserver
 }