RFR: 8054717: SJavac should track changes in the public apis of classpath classes!

[Andreas Lundblad]

> > > [...]
> > > 
> > > Link to web review:
> > > http://cr.openjdk.java.net/~alundblad/8054717
> > > 
> > > Link to bug report:
> > > http://bugs.openjdk.java.net/browse/JDK-8054717
> > > 
> > > -- Andreas Lundblad

Another revision up for review.

This fixes a bug where sjavac erroneously recompiled files containing inner classes during incremental builds.

-- Andreas