hg: jdk-updates/jdk12u: 8219857: Shenandoah GC may initialize thread's gclab twice

[zgu at redhat.com]

Changeset: 60826c7dbeb2
Author:    zgu
Date:      2019-02-28 08:44 -0500
URL:       http://hg.openjdk.java.net/jdk-updates/jdk12u/rev/60826c7dbeb2

8219857: Shenandoah GC may initialize thread's gclab twice
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahThreadLocalData.hpp