RFR: JDK-8227715: GPLv2 files missing Classpath Exception

[Florian Weimer]

* Adam Farley8:

> Four GPLv2 files in 8u seem to be missing the classpath exception from the 
> copyright section.
>
> Requesting reviews and a sponsor.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8227715
>
> Webrev: http://cr.openjdk.java.net/~afarley/8227715/webrev/

All these files are not used at run time, so this could be deliberate.