hg: shenandoah/jdk: Fix build failure after "8230765: Implement nmethod barrier for x86_32 platforms"

[shade at redhat.com]

Changeset: 1e9f6bb4f546
Author:    shade
Date:      2019-10-20 20:58 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk/rev/1e9f6bb4f546

Fix build failure after "8230765: Implement nmethod barrier for x86_32 platforms"

! src/hotspot/cpu/x86/sharedRuntime_x86_32.cpp