hg: shenandoah/jdk9/hotspot: Avoid double-touching array headers during mark.

[ashipile at redhat.com]

Changeset: 87e70319cea2
Author:    shade
Date:      2017-01-11 18:30 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/87e70319cea2

Avoid double-touching array headers during mark.

! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.inline.hpp