* lib/rubygems: Update to RubyGems master dcce4ff. Important changes

in this commit:

  Remove automatic detection of gem dependencies files.  This prevents a
  security hole as described in [ruby-core:58490]

  Fixed bugs for installing git gems.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43806 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/source/git.rb

@@ -120,6 +120,12 @@ class Gem::Source::Git < Gem::Source
     rev_parse[0..11]
   end
 
+  ##
+  # Nothing to download for git gems
+
+  def download full_spec, path # :nodoc:
+  end
+
   ##
   # The directory where the git gem will be installed.