xarchive: disable format hardening

pkgs/tools/archivers/xarchive/default.nix

···
 
   buildInputs = [ gtk2 pkgconfig ];
 
+  hardening_format = false;
+
   meta = {
     description = "A GTK+ front-end for command line archiving tools";
     maintainers = [ stdenv.lib.maintainers.iElectric ];