load.c: hide internal objects

* load.c (rb_construct_expanded_load_path, Init_load): hide internal
  objects, expanded_load_path, {load_path,loaded_features}_snapshot,
  and loaded_features_index in the VM, and ruby_dln_librefs.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39646 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
fix commit miss

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39647 b2dd03c8-39d4-4d8f-98ff-823fe69b080e