hg: build-infra/jdk9: Added jspawnhelper to general files exceptions in compare.sh

[erik.joelsson at oracle.com]

Changeset: 9b883c59546c
Author:    erikj
Date:      2015-03-12 17:36 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/9b883c59546c

Added jspawnhelper to general files exceptions in compare.sh

! common/bin/compare.sh