overlay: delay overlay_apply a bit so it happens after runit's tail_install()

overlay.in

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: target/mnemosyne/overlay.in
-# Copyright (C) 2008 The OpenSDE Project
+# Copyright (C) 2008 - 2010 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -22,7 +22,7 @@ mnemosyne_overlay_apply() {
 	done
 }
 
-hook_add postdoc 5 'eval mnemosyne_overlay_apply $mnemosyne_overlay'
+hook_add postdoc 6 'eval mnemosyne_overlay_apply $mnemosyne_overlay'
 
 # $pkg specific overlays
 y="pkgs"