cosmetic change, use the binary not the link

package/xorg-server/files/xorg-server.postinst

@@ -1,5 +1,5 @@
 #!/bin/sh
-if [ -z $IPKG_INSTROOT ];then chmod u+s /usr/bin/X;fi
+if [ -z $IPKG_INSTROOT ];then chmod u+s /usr/bin/Xorg;fi
 . $IPKG_INSTROOT/etc/functions.sh
 gid=$(get_next_gid)
 add_group video $gid