Hello, This is a small followup fix for JDK-8170741. It addresses the following:
* The new run-test-prebuilt profile is missing the JT_HOME environment variable from boot_jdk.
* There are no compact profiles bundles to publish. I have created a new top level target to create these bundles and enabled publishing of them in jib-profiles.js.
Bug: https://bugs.openjdk.java.net/browse/JDK-8172241 Webrev: http://cr.openjdk.java.net/~erikj/8172241/webrev.01/
