RFR: JDK-8167488: Race condition in build with new exploded-image-optimize target

[Tim Bell]

Hello Erik:

> When introducing the exploded-image-optimize target, I tried to fix all
> the dependencies so that the module-info.class files would not be used
> by any other target at the same time as the optimization was happening.
> It seems I forgot about one class of such uses. Any java compilation
> target that links to the classes in jdk/modules is potentially affected.
>
> This patch addresses all the cases I could find.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8167488
>
> Webrev: http://cr.openjdk.java.net/~erikj/8167488/webrev.01/

Looks good to me.

Tim