hg: shenandoah/jdk8u/hotspot: [backport] Region sampling may not be enabled because last timetick is uninitialized

[ashipile at redhat.com]

Changeset: 2dd39224c175
Author:    shade
Date:      2017-05-11 21:14 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/2dd39224c175

[backport] Region sampling may not be enabled because last timetick is uninitialized

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