Review Request: 8006100: build-infra: Bundle up the correct images in jprt

[Tim Bell]

Erik:

> This fixes the bundles target for jprt so that overlay images are 
> bundled up for solaris 64bit.
>
> http://cr.openjdk.java.net/~erikj/8006100/webrev.root.01/

Looks good.

> Even if several people would like to do away with the overlay images, 
> that change should be separate to switching to build-infra.

I agree.  That is a worthwhile project, but it can be done at some point 
after the current build-infra changes are completed.

Tim