system/zfs-on-linux: Create /var/lock/zfs before lockfile
system/zfs-on-linux: Create /var/lock/zfs before lockfile

This is for people who have /var/lock on tmpfs or some
other non-persistent-across-reboots filesystem.

Signed-off-by: Robby Workman <2f5326e16de92cfeea9ded47a50f5e7144bd5a01@slackbuilds.org>

panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds,panosmdma/SlackOnly-SlackBuilds