* 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