kodi-retroarch-advanced-launchers: take lib arg

This package was changed to refer to `lib` instead of `stdenv.lib`, but
`lib` was not actually in scope. I don't know what this package is about
or how evaluation got to that point, but this is clearly more correct.

pkgs/misc/emulators/retroarch/kodi-advanced-launchers.nix

@@ -1,9 +1,7 @@
-{ stdenv, pkgs, cores, runtimeShell }:
+{ stdenv, pkgs, lib, cores, runtimeShell }:
 
 assert cores != [];
 
-with pkgs.lib;
-
 let
 
   script = exec: ''