hg: build-infra/jdk7: More work on compare images.

[fredrik.ohrstrom at oracle.com]

Changeset: 49e19c1e9ffc
Author:    ohrstrom
Date:      2011-11-28 16:43 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk7/rev/49e19c1e9ffc

More work on compare images.

! common/bin/compareimage.sh
! common/bin/diffjarzip.sh
! common/make/JavaCompilation.gmk
! version.numbers