RFR: 8217845: SA should refer const values for JVMFlag from HotSpot

[Yasumasa Suenaga]

Hi all,

Please review this change:

   JBS: https://bugs.openjdk.java.net/browse/JDK-8217845
   webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8217845/webrev.00/

SA will handle `Flags` enums to get flag origin.
However SA has const value for bitmask for flag, and shows as raw (int) value.
This issue is commented in [1].


Thanks,

Yasumasa


[1] http://hg.openjdk.java.net/jdk/jdk/file/8c035b34248d/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VM.java#l166