hg: shenandoah/jdk: Cherry-pick: 8221735: Shenandoah fails ctw/modules/jdk_management_agent.java with Traversal

[shade at redhat.com]

Changeset: c5a159a6b36d
Author:    shade
Date:      2019-04-01 13:33 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/c5a159a6b36d

Cherry-pick: 8221735: Shenandoah fails ctw/modules/jdk_management_agent.java with Traversal

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp