* lib/rbconfig/obsolete.rb (respond_to_missing?): use send because
  RbConfig.respond_to_missing? is now private.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38769 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-01-11

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38770 b2dd03c8-39d4-4d8f-98ff-823fe69b080e