hg: shenandoah/jdk10: String deduplication for traversal GC

[zgu at redhat.com]

Changeset: 6657b88f3a63
Author:    zgu
Date:      2018-01-31 08:19 -0500
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/rev/6657b88f3a63

String deduplication for traversal GC

! src/hotspot/share/gc/shenandoah/shenandoahOopClosures.hpp
! src/hotspot/share/gc/shenandoah/shenandoahOopClosures.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoah_specialized_oop_closures.hpp
! test/hotspot/jtreg/gc/shenandoah/ShenandoahStrDedupStress.java