hg: shenandoah/jdk10: Forcefully update counters when GC cycle is running

[ashipile at redhat.com]

Changeset: 189320da8f9f
Author:    shade
Date:      2017-11-06 13:18 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/rev/189320da8f9f

Forcefully update counters when GC cycle is running

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentThread.cpp
! src/hotspot/share/gc/shenandoah/shenandoahConcurrentThread.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp