merge revision(s) 44515: [Backport #9375]
* lib/rubygems: Update to RubyGems master 21e409d / RubyGems 2.2.1. See http://rubygems.rubyforge.org/rubygems-update/History_txt.html for a list of bug fixes. * test/rubygems: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44778 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 44515: [Backport #9375]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44778 b2dd03c8-39d4-4d8f-98ff-823fe69b080e