hg: jdk9/sandbox: Fixed zip-source on windows and fixed incremental build performance regression for it

[erik.joelsson at oracle.com]

Changeset: daf1463032db
Author:    erikj
Date:      2016-03-22 15:43 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/daf1463032db

Fixed zip-source on windows and fixed incremental build performance regression for it

! make/ZipSource.gmk
! make/common/FileSet.gmk