* lib/rubygems:  Update to RubyGems master 612f85a.  Notable changes:

  Fixed installation and activation of git: and path: gems via
  Gem.use_gemdeps

  Improved documentation coverage

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-11-26

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43846 b2dd03c8-39d4-4d8f-98ff-823fe69b080e