RFR (S) : 8074980 : add WhiteBox API to get a flag value for a method

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev/8074980/root/webrev.00/
> 18 lines changed: 18 ins; 0 del; 0 mod;
http://cr.openjdk.java.net/~iignatyev/8074980/hotspot/webrev.00/
> 201 lines changed: 201 ins; 0 del; 0 mod;

Hi all,

please review the patch which adds API to get option value specific for 
a method.

bug: https://bugs.openjdk.java.net/browse/JDK-8074980
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Thanks,
Igor