Request for reviews (XS): 6710654: SAJDI failures with Compressed Oops

[Vladimir Kozlov]

http://webrev.invokedynamic.info/kvn/6710654/index.html

Fixed 6710654: SAJDI failures with Compressed Oops

Problem:
Failed SAJDI test cases after 6703888 changes.
After the fix 6703888 the hidden field _klass in java.lang.Class
was moved into the gap after klass (offset 12).
But SA was not fixed for that.

Solution:
Use correct offset for the _klass field in SA.

Reviewed by:
Fix verified (y/n): y, failed test cases.

Other testing:
JPRT, NSK tests