hg: jdk9/sandbox: 8074910: hgforest.sh needs an option to bring over a smaller set of extra repos

[chris.hegarty at oracle.com]

Changeset: 6ad4e1ab9bc4
Author:    prr
Date:      2015-03-11 08:25 -0700
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/6ad4e1ab9bc4

8074910: hgforest.sh needs an option to bring over a smaller set of extra repos
Reviewed-by: erikj, chegar

! common/bin/hgforest.sh