* lib/rubygems:  Update to RubyGems master cee6788.  Changes:

  Fix test failure on vc10-x64 Server on rubyci.org due to attempting
  to File.chmod where it is not supported.

  Continuing work on improved gem dependencies file (Gemfile) support.

* test:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43347 b2dd03c8-39d4-4d8f-98ff-823fe69b080e