RR(XS): JDK-8024056 runtime/InitialThreadOverflow/testme.sh fails

[Dmitry Samersoff]

Hi Everybody,

http://cr.openjdk.java.net/~dsamersoff/JDK-8024056/webrev.01/

Please review small correction to the test.

On some linuxes gcc not able to link cxx binary. Explicitly check for g++

-Dmitry

-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.