Fixes: #572

Do not bind ["package private"][0] nested types   For example, given:

	public class OuterExample {
	    /* package */ static class InnerExample {
	    }
	}

The type `OuterExample.InnerExample` *should not be bound*.

Previously `OuterExample.InnerExample` *would* be bound as a
*`public`* type (?!), which could result in later Java Callable Wrapper
compilation errors, if/when they attempted to access the
package-private types

This change causes package-private nested types to behave the same as
top-level package-private types, which were never bound.

[0]: https://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html