RFR(XXS): JDK-8143261 - Need possibility to add custom platforms to run hotspot jtreg tests in jprt

[Dmitrij Pochepko]

Hi,

please take a look at fix for enhancement JDK-8143261: Need possibility 
to add custom platforms to run hotspot jtreg tests in jprt.

A problem: there is no possibility to specify jprt tested platforms for 
hotspot tests other than in make/jprt.properties. It needs to be more 
flexible.

Solution: i've added variable to respective definition in a same manner 
as it's used in other parts of this property file.

Issue: https://bugs.openjdk.java.net/browse/JDK-8143261
Webrev: http://cr.openjdk.java.net/~dpochepk/8143261/webrev.01/

Thanks,
Dmitrij