* lib/rubygems:  Update to RubyGems 2.0.3
* test/rubygems:  Tests for the above.
* NEWS:  Added RubyGems 2.0.3 note.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e