hg: shenandoah/jdk10/hotspot: Concurrent partial should fix up roots only on cancel

[ashipile at redhat.com]

Changeset: b6050ad1f970
Author:    shade
Date:      2017-10-10 15:33 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/hotspot/rev/b6050ad1f970

Concurrent partial should fix up roots only on cancel

! src/share/vm/gc/shenandoah/shenandoahPartialGC.cpp