RFR JDK-8046282: SA update

[Poonam Bajaj]

Hi,

Please review these changes for the bug 8046282 for JDK 9.  These 
changes add some definitions on the SA side and the supporting code on 
the hotspot side.

Webrev: http://cr.openjdk.java.net/~poonam/8046282/webrev.00/
Bug: https://bugs.openjdk.java.net/browse/JDK-8046282

Thanks,
Poonam