nfs/nfsroot.sh: trigger nfs mount with cat'ing /etc/fstab

otherwise the whole nfs communication can take too long for the
systemd-fstab-generator

modules.d/95nfs/nfsroot.sh

@@ -18,6 +18,8 @@ nfs_to_var $root $netif
 
 mount_nfs $root $NEWROOT $netif && { [ -e /dev/root ] || ln -s null /dev/root ; }
 
+cat $NEWROOT/etc/fstab > /dev/null
+
 # inject new exit_if_exists
 echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/initqueue/nfs.sh
 # force udevsettle to break