RFR(XS): JDK-8153856 com/sun/jdi/WatchFramePop.sh fails with exit code 1

[Dmitry Samersoff]

Everybody,

Please review a small fix.

http://cr.openjdk.java.net/~dsamersoff/JDK-8153856/webrev.01/

This fix doesn't fix root cause of the test fail but fix small test bug
to get better diagnostic.

-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.