RFR: 8221477: Inject os/cpu-specific constants into Unsafe from JVM

[Andrew Dinn]

New webrev is now available. Re-reviews welcome.

JIRA:   https://bugs.openjdk.java.net/browse/JDK-8221477
Webrev: http://cr.openjdk.java.net/~adinn/8221477/webrev.03

This version should address all comments from Thomas, David and Coleen.

Testing
Tier1 test passed.
Submit test passed.

regards,


Andrew Dinn
-----------
Senior Principal Software Engineer
Red Hat UK Ltd
Registered in England and Wales under Company Registration No. 03798903
Directors: Michael Cunningham, Michael ("Mike") O'Neill, Eric Shander