* lib/rubygems/request_set/lockfile.rb:  Import RubyGems master a8d0669
  with a 1.8.7 compatibility fix.
* test/rubygems/test_gem_request_set_lockfile.rb:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44159 b2dd03c8-39d4-4d8f-98ff-823fe69b080e