RFR 8040692: [TESTBUG] sun/management/jmxremote/bootstrap/JvmstatCountersTest.java requires -XX:+UsePerfData option to pass on embedded platforms

[Jaroslav Bachorik]

Please, review this simple fix.

Issue : https://bugs.openjdk.java.net/browse/JDK-8040692
Webrev: http://cr.openjdk.java.net/~jbachorik/8040692/webrev.00

On embedded platforms it is necessary to provide "-XX:+UsePerfData" flag 
in order to make the performance counters accessible. This fix does this 
for the tests which need to access the performance counters.

Thanks,

-JB-