[9] RFR (XS) 8066507: JPRT is not capable of running jtreg tests located jdk/test

[Tim Bell]

Hi Chris:

> Please review the following fix to allow running jdk jtreg tests using 
> JPRT -rtests. This is the same fix that his been in place in 
> hotspot/test/Makefile for a while now, so I just copied from there to 
> jdk/test/Makefile.
>
> https://bugs.openjdk.java.net/browse/JDK-8066507
> http://cr.openjdk.java.net/~cjplummer/8066507/webrev.00/

Looks good to me.

Tim