Paraver: Use wrapGApps Hook for nixos

Needed to fix the error on NixOS:

  GLib-GIO-ERROR **: No GSettings schemas are installed on the system

See https://github.com/NixOS/nixpkgs/issues/16285



Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Tested-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>