hg: build-infra/jdk8: Fixed compare script so that it runs on windows. Still a lot of diffs.

[erik.joelsson at oracle.com]

Changeset: 6038651d3ef2
Author:    erikj
Date:      2012-03-27 15:32 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/6038651d3ef2

Fixed compare script so that it runs on windows. Still a lot of diffs.

! common/bin/compareimage.sh
! common/bin/diffexec.sh
! common/bin/diffjarzip.sh
! common/bin/difflib.sh