hg: shenandoah/jdk8u/hotspot: Fix force termination detection by spin master

[zgu at redhat.com]

Changeset: 6d2b4771063a
Author:    zgu
Date:      2018-10-18 15:36 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/6d2b4771063a

Fix force termination detection by spin master

! src/share/vm/gc_implementation/shenandoah/shenandoahTaskqueue.cpp