RFR: JDK-8172241: Cleanup mistakes in jib publish support change

Mon Jan 9 12:37:44 UTC 2017

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/