hg: shenandoah/jdk8u/hotspot: MacroAssembler and ShenandoahBarrierSet reference x86_64 registers.

[ashipile at redhat.com]

Changeset: 32b90af18832
Author:    shade
Date:      2017-03-20 19:08 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/32b90af18832

MacroAssembler and ShenandoahBarrierSet reference x86_64 registers.

! src/cpu/x86/vm/macroAssembler_x86.cpp
! src/cpu/x86/vm/shenandoahBarrierSet_x86.cpp