RFR 8058899: Put test 'java/lang/instrument/NativeMethodPrefixAgent.java' on ProblemList

[Jaroslav Bachorik]

Please, review this addition to ProblemList.txt

Issue             : https://bugs.openjdk.java.net/browse/JDK-8058899
Failing test issue: https://bugs.openjdk.java.net/browse/JDK-8058536
Webrev            : http://cr.openjdk.java.net/~jbachorik/8058899/webrev.00

Thanks,

-JB-