* gc.c: rename
  * total_allocated_object_num -> total_allocated_objects
  * total_allocated_object_num_at_gc_start -> total_allocated_objects_at_gc_start
  * total_freed_object_num -> total_freed_objects
* gc.c (gc_stat_internal):
  * rename total_allocated_object -> total_allocated_objects
  * rename total_freed_object -> total_freed_objects



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e