JDK-8245594 removed some volatile-qualified members, so now x86_32 build fails with:

In file included from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahWorkGroup.hpp:29:0,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahHeap.inline.hpp:36,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.inline.hpp:30,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp:31,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shared/barrierSetConfig.inline.hpp:40,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/access.inline.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oopHandle.inline.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/cpCache.inline.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/interpreter/abstractInterpreter.cpp:41:
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp: In member function 'volatile ObjArrayChunkedTask& ObjArrayChunkedTask::operator=(const volatile ObjArrayChunkedTask&) volatile':
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp:236:37: error: passing 'volatile oop' as 'this' argument discards qualifiers [-fpermissive]
     (void)const_cast<oop&>(_obj = t._obj);
                                     ^~~~
In file included from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/memory/iterator.hpp:30:0,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oop.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/runtime/handles.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/code/oopRecorder.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/codeBuffer.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/assembler.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/macroAssembler.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/interpreter/abstractInterpreter.cpp:26:
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oopsHierarchy.hpp:104:8: note: in call to 'oop& oop::operator=(const oop&)'
   oop& operator=(const oop& o) { _o = o._o; return *this; }
        ^~~~~~~~
In file included from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahWorkGroup.hpp:29:0,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahHeap.inline.hpp:36,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahCollectionSet.inline.hpp:30,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp:31,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shared/barrierSetConfig.inline.hpp:40,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/access.inline.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oopHandle.inline.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/cpCache.inline.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/interpreter/abstractInterpreter.cpp:41:
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp:236:37: error: binding 'const volatile oop' to reference of type 'const oop&' discards qualifiers
     (void)const_cast<oop&>(_obj = t._obj);
                                   ~~^~~~
In file included from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/memory/iterator.hpp:30:0,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oop.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/runtime/handles.hpp:29,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/code/oopRecorder.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/codeBuffer.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/assembler.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/asm/macroAssembler.hpp:28,
                 from /home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/interpreter/abstractInterpreter.cpp:26:
/home/buildbot/worker/build-jdkX-linux/build/src/hotspot/share/oops/oopsHierarchy.hpp:104:8: note: initializing argument 1 of 'oop& oop::operator=(const oop&)'
   oop& operator=(const oop& o) { _o = o._o; return *this; }
        ^~~~~~~~