RFR(M): 8017317: PPC64 (part 7): cppInterpreter: implement support for biased locking

[Lindenmaier, Goetz]

Hi,

To use biased locking in our PPC64 VM,we fixed the biased locking implementation
in the cppInterpreter.  We also added  BiasedLockingStatistic support.
We need an additional ordering operation in revoke_bias() when writing
the mark.
The change enables biased locking for ppc64 per default.
http://cr.openjdk.java.net/~goetz/webrevs/8017317-lock/

Please review and test this change.

Best regards,
  Goetz

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