[8u60] RFR: 8035663 Suspicious failure of test java/util/concurrent/Phaser/FickleRegister.java

[David Holmes]

Please approve the backport of this fix to 8u60 (jdk8u/hs-dev forest). 
The patch from 9 applied cleanly.

Original closed bug: https://bugs.openjdk.java.net/browse/JDK-8035663
Open backport for 9: https://bugs.openjdk.java.net/browse/JDK-8061564
JDK 9 changeset: 
http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/478aaf1a3848

webrev for 8u60: http://cr.openjdk.java.net/~dholmes/8035663/webrev.8u60/

Thanks,
David