hg: shenandoah/jdk: Use s-macro to keep GC phase enum and names in sync

[zgu at redhat.com]

Changeset: 63a1c8ed2197
Author:    zgu
Date:      2018-09-27 10:25 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/63a1c8ed2197

 Use s-macro to keep GC phase enum and names in sync

! src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.cpp
! src/hotspot/share/gc/shenandoah/shenandoahPhaseTimings.hpp