RFR: JDK-8215239: Make deletes images/jdk/bin/java if something goes wrong

[Tim Bell]

Erik:

Looks good to me as well.

Tim

> If something goes wrong in the recipe for creating the jdk image, make
> will automatically delete the target of the recipe, which happens to be
> bin/java in the image. This is unfortunate, because that file is rather
> useful when troubleshooting what went wrong.
>
> I propose to fix this by changing the target to the release file in the
> root of the image instead.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8215239
>
> Webrev: http://cr.openjdk.java.net/~erikj/8215239/webrev.01/
>
> /Erik