hg: jdk-updates/jdk12u: 8221278: Shenandoah should not enqueue string dedup candidates during root scan

[shade at redhat.com]

Changeset: 798e844c555c
Author:    rkennke
Date:      2019-03-21 22:37 +0100
URL:       http://hg.openjdk.java.net/jdk-updates/jdk12u/rev/798e844c555c

8221278: Shenandoah should not enqueue string dedup candidates during root scan
Reviewed-by: shade

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp