hg: shenandoah/jdk9/hotspot: Added UseDynamicNumberOfGCThreads support in Shenandoah

[zgu at redhat.com]

Changeset: 4d544ac5d034
Author:    zgu
Date:      2017-02-06 16:58 -0500
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/4d544ac5d034

Added UseDynamicNumberOfGCThreads support in Shenandoah

! src/share/vm/gc/shared/workgroup.hpp
! src/share/vm/gc/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc/shenandoah/shenandoahCollectorPolicy.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahMarkCompact.cpp
+ src/share/vm/gc/shenandoah/shenandoahWorkGroup.cpp
+ src/share/vm/gc/shenandoah/shenandoahWorkGroup.hpp