create /selinux in initrd, guestfsd tries to bind mount it into the guest

OBS-URL: https://build.opensuse.org/package/show/Virtualization/libguestfs?expand=0&rev=83

libguestfs.mkinitrd.setup.sh

@@ -6,6 +6,9 @@
 # in guestfsd the mount point defaults to /sysroot
 mkdir -vp $tmp_mnt/sysroot
 
+# guestfsd tries to bind mount this directory
+mkdir -vp $tmp_mnt/selinux
+
 for f in /etc/magic /usr/share/misc/magic*
 do
 	if test -e $f