Review Request: 8007275: build-infra: Create final-images target

[Tim Bell]

Erik:

> Open part of this review.
>
> Adding a target "final-images" which copies the images to use to the 
> same location, regardless of platform. For OpenJDK, the only problem 
> this solves is the overlay-images on Solaris 64bit, which have a 
> different directory name to the normal images. This target is separate 
> from the all and default targets and must be explicitly called, so it 
> shouldn't bother anyone who doesn't want to use it.
>
> I put it in Jprt.gmk, part because it shares logic with the jprt 
> specific bundles target but also because like jprt it's sort of Oracle 
> specific.
>
> http://cr.openjdk.java.net/~erikj/8007275/webrev.root.01/

Looks good.

Tim