hg: shenandoah/jdk: Fix order of Shenandoah GC phase enum

[zgu at redhat.com]

Changeset: 7756fbadc938
Author:    zgu
Date:      2018-09-28 09:54 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/7756fbadc938

Fix order of Shenandoah GC phase enum

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