hg: shenandoah/jdk8u/hotspot: Added missing barriers

[roman at kennke.org]

Changeset: 600058448158
Author:    rkennke
Date:      2016-04-29 18:36 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/600058448158

Added missing barriers

! src/cpu/x86/vm/templateInterpreter_x86_64.cpp
! src/share/vm/prims/jni.cpp
! src/share/vm/prims/unsafe.cpp