hg: shenandoah/jdk10: Verify fwdptr accesses during Full GC moves

[ashipile at redhat.com]

Changeset: c24f64323317
Author:    shade
Date:      2017-11-14 21:59 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/rev/c24f64323317

Verify fwdptr accesses during Full GC moves

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahMarkCompact.cpp
! src/hotspot/share/gc/shenandoah/shenandoahVerifier.cpp