[7u6] Request for approval for CR7165257 / 7175802 - Add JFR tests to the JDK code base

[Staffan Larsen]

Please approve this change to makefiles to allow JFR tests to be run.

JDK8 changesets: 
  http://hg.openjdk.java.net/jdk8/tl/jdk/rev/82c41d3065e2 
  http://hg.openjdk.java.net/jdk8/tl/rev/1af3996aa431

Review thread: 
  
http://mail.openjdk.java.net/pipermail/serviceability-dev/2012-June/006247.html

Thanks,
/Staffan