Fixes and improvements to GC sharing phase.  Fix sharing of byte objects.  Fix count of shared objects to get the correct figure for the effect of the sharing pass.  Improve logging.
Fixes and improvements to GC sharing phase.  Fix sharing of byte objects.  Fix count of shared objects to get the correct figure for the effect of the sharing pass.  Improve logging.

git-svn-id: 98787b36aaefbae4b30fa755be920954cd25e1e4@1564 ae7d391e-3f74-4a2b-a0db-a8776840fd2a

mn200/polyml,polyml/polyml,mn200/polyml,dcjm/polyml,mn200/polyml,polyml/polyml,dcjm/polyml,polyml/polyml,polyml/polyml,dcjm/polyml,dcjm/polyml,mn200/polyml