hg: shenandoah/jdk9/hotspot: Print heap changes in phases that actually change heap occupancy

[ashipile at redhat.com]

Changeset: 783aaa07ce76
Author:    shade
Date:      2017-05-10 12:30 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/783aaa07ce76

Print heap changes in phases that actually change heap occupancy

! src/share/vm/gc/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc/shenandoah/vm_operations_shenandoah.cpp