RFR: 8065172: More core reflection final and volatile annotations

[Martin Buchholz]

Hi Joe, Peter, Paul

This is the followup on thread safety I promised Peter.
As I said before, I'm willing to take the risk to use fields written
via a race if we have a reflective test proving it correct, and the
bug contains the 0.1 version of such a test.

https://bugs.openjdk.java.net/browse/JDK-8065172
http://cr.openjdk.java.net/~martin/webrevs/openjdk9/core-reflection-more-safety/