8005002: Crash because of a raw oop in ClassLoaderData::add_dependency Summary: Move the handelization of 'last' to a point before the GC might enter. Reviewed-by: dholmes, sspitsyn, coleenp

// A simple interface, to allow an unknown foreign call from a class
// loaded with LOADER1 to a class loaded with LOADER2.
public interface IFace {
  public many_loader[] gen();
}