RFR (S): Merge strict oop operations for new upstream code

[Roman Kennke]

> Hi,
> 
> This is another post-merge fixup:
>   http://cr.openjdk.java.net/~shade/shenandoah/merge9-strictoops/webrev.01/
> 
> Current head fails jcstress with -XX:+VerifyStrictOopOperations because of this.
> 
> Testing: hotspot_gc_shenandoah, jcstress -m quick
> 
> Thanks,
> -Aleksey


Yes!