hg: shenandoah/jdk: zgc build fix

[rwestrel at redhat.com]

Changeset: 00d6ca8a280b
Author:    roland
Date:      2018-06-13 16:21 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/00d6ca8a280b

zgc build fix

! src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp
! src/hotspot/share/opto/compile.hpp
! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/loopnode.hpp