overlayfs implementation

extra/pre-build.d/usr/lib/initcpio/install/livecd

@@ -5,6 +5,7 @@ build()
 	add_module 'squashfs'
 	add_module 'loop'
 	add_module 'aufs'
+	add_module 'overlay'
 
         add_binary "sed"
         add_binary "pkill"
@@ -16,6 +17,6 @@ build()
 help() 
 {
         cat <<HELPEOF
-Mount a squashed flat-file directory with AUFS3 on /
+Mount a squashed flat-file directory with OverlayFS on /
 HELPEOF
 }