* gc.c (rgengc_rememberset_mark): record
  (1) normal objects count in remember set
  (2) shady objects count in remember set
  each GC timing.
* gc.c (gc_profile_record_get): enable to access above information
  and REMOVING_OBJECTS, EMPTY_OBJECTS.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41493 b2dd03c8-39d4-4d8f-98ff-823fe69b080e