Review request for JDK-8023630

[Attila Szegedi]

Please review JDK-8023630 at <http://cr.openjdk.java.net/~attila/8023630/webrev.00>

This is the implementation of Java.super(); basically, it returns an object that delegates to the super$ methods of its arguments, e.g.

	var w_super = Java.super(w)

then w_super.write(x) is actually equivalent to w.super$write(x).

Thanks,
  Attila.