hg: build-infra/jdk8: Incremental build of changes in jaf/jaxws did not update the jar properly because

[fredrik.ohrstrom at oracle.com]

Changeset: 48859f58e330
Author:    ohrstrom
Date:      2012-11-05 10:49 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/48859f58e330

Incremental build of changes in jaf/jaxws did not update the jar properly because
the contents file sometimes contains whitespace, even though there is nothing to do.
The test must clean out the whitespace.

! common/makefiles/JavaCompilation.gmk