hg: shenandoah/jdk9/hotspot: Rebuild free set after update-refs, ignore cset in heuristics when update-refs are enabled.

[ashipile at redhat.com]

Changeset: 0b7c03a7aaec
Author:    shade
Date:      2017-04-21 18:46 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/0b7c03a7aaec

Rebuild free set after update-refs, ignore cset in heuristics when update-refs are enabled.

! src/share/vm/gc/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp