RFR: Typo in scoped phase object tag

[Aleksey Shipilev]

Little typo:

$ hg diff
diff -r 6adead593193 src/share/vm/gc/shenandoah/shenandoahConcurrentThread.cpp
--- a/src/share/vm/gc/shenandoah/shenandoahConcurrentThread.cpp	Thu Jun 15
12:45:49 2017 +0200
+++ b/src/share/vm/gc/shenandoah/shenandoahConcurrentThread.cpp	Thu Jun 15
16:23:13 2017 +0200
@@ -235,7 +235,7 @@

     {
       ShenandoahGCPhase total(ShenandoahCollectorPolicy::total_pause_gross);
-      ShenandoahGCPhase
final_update_refs_phase(ShenandoahCollectorPolicy::total_pause_gross);
+      ShenandoahGCPhase
final_update_refs_phase(ShenandoahCollectorPolicy::final_update_refs_gross);
       VM_ShenandoahFinalUpdateRefs final_update_refs;
       VMThread::execute(&final_update_refs);
     }

-Aleksey