[8u60] RFA 8080623 CPU overhead in FJ due to spinning in awaitWork

[Paul Sandoz]

Hi,

I would like to backport the following to 8u60:

https://bugs.openjdk.java.net/browse/JDK-8080623

Review:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-May/033570.html

Patch applies cleanly:
http://hg.openjdk.java.net/jdk9/dev/jdk/rev/dec15d6a0cbc

Thanks,
Paul.