RFR: JDK-8211130: Change to Oracle Developer Studio 12.6 for building on Solaris at Oracle

Tue Sep 25 22:18:32 UTC 2018

It's time for Oracle to change the official compiler used for building 
OpenJDK on Solaris. The new version will be Oracle Developer Studio 12.6 
and the build will happen on Solaris 11.3. This patch changes the jib 
dependency to use the new devkit and updates the devkit generator script 
with the latest changes needed to produce the kit we are switching to.

Bug: https://bugs.openjdk.java.net/browse/JDK-8211130

Webrev: http://cr.openjdk.java.net/~erikj/8211130/webrev.01/

/Erik