virt-sanlock-cleanup; Fix augtool usage

Surprisingly, augtool get (or print) returns "path = value" while we are
only interested in the value. We need to remove the "path = " part from
the augtool's output. The following is an example of the augtool command
as used in virt-sanlock-cleanup script:

$ augtool get /files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir
/files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir = /var/lib/libvirt/sanlock

tools/virt-sanlock-cleanup.in

@@ -26,7 +26,8 @@ fi
 
 LOCKSPACE="__LIBVIRT__DISKS__"
 
-LOCKDIR=`augtool print '/files@sysconfdir@/libvirt/qemu-sanlock.conf/disk_lease_dir'`
+LOCKDIR=`augtool get '/files@sysconfdir@/libvirt/qemu-sanlock.conf/disk_lease_dir'`
+LOCKDIR=${LOCKDIR#* = }
 if test $? != 0 || test "x$LOCKDIR" = "x" ; then
   LOCKDIR="@localstatedir@/lib/libvirt/sanlock"
 fi