hg: shenandoah/jdk8/hotspot: Fix ShenandoahLoadReferenceBarrierNode::{Value, Identity} signatures after LRB backport

[rwestrel at redhat.com]

Changeset: e040b7d17b6f
Author:    roland
Date:      2019-10-25 17:22 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/e040b7d17b6f

Fix ShenandoahLoadReferenceBarrierNode::{Value, Identity} signatures after LRB backport

! src/share/vm/gc_implementation/shenandoah/shenandoahSupport.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahSupport.hpp