hg: shenandoah/jdk: Fix x86_32 build

[shade at redhat.com]

Changeset: 57c99e69d759
Author:    shade
Date:      2018-09-13 13:17 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/57c99e69d759

Fix x86_32 build

! src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp