RFR (XS): 8212753: Improve oopDesc::forward_to_atomic

[Thomas Schatzl]

Hi Martin,

On Mon, 2018-10-22 at 14:00 +0000, Doerr, Martin wrote:
> Hi Thomas,
> 
> this looks like a nice cleanup. Thanks for improving. Your changes
> look correct.

  thanks for your review

Thomas