hg: shenandoah/jdk: Workaround degen-traversal bugs with evac-assists enabled

[ashipile at redhat.com]

Changeset: 369a25bb0a28
Author:    shade
Date:      2018-08-21 11:28 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/369a25bb0a28

Workaround degen-traversal bugs with evac-assists enabled

! src/hotspot/share/gc/shenandoah/heuristics/shenandoahTraversalHeuristics.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp