hg: shenandoah/jdk8u/hotspot: [backport] Heap memory usage counting not longer needs to be atomic

[ashipile at redhat.com]

Changeset: cc8e01c92e0e
Author:    shade
Date:      2017-05-09 17:52 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/cc8e01c92e0e

[backport] Heap memory usage counting not longer needs to be atomic

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