* lib/rubygems: Update to RubyGems HEAD(c202db2).

this version contains many enhancements see http://git.io/vtNwF
* test/rubygems: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51092 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_commands_dependency_command.rb

@@ -28,6 +28,8 @@ class TestGemCommandsDependencyCommand < Gem::TestCase
   end
 
   def test_execute_no_args
+    install_specs new_spec 'x', '2'
+
     spec_fetcher do |fetcher|
       fetcher.spec 'a', 1
       fetcher.spec 'a', '2.a'
@@ -51,6 +53,8 @@ Gem dep_x-1
 
 Gem pl-1-x86-linux
 
+Gem x-2
+
     EOF
 
     assert_equal expected, @ui.output
@@ -71,9 +75,11 @@ Gem pl-1-x86-linux
   end
 
   def test_execute_pipe_format
-    util_spec 'foo' do |gem|
+    spec = util_spec 'foo' do |gem|
       gem.add_dependency 'bar', '> 1'
     end
+    install_specs util_spec 'bar', 2
+    install_specs spec
 
     @cmd.options[:args] = %w[foo]
     @cmd.options[:pipe_format] = true
@@ -164,6 +170,8 @@ ERROR:  Only reverse dependencies for local gems are supported.
   end
 
   def test_execute_remote
+    install_specs new_spec 'bar', '2'
+
     spec_fetcher do |fetcher|
       fetcher.spec 'foo', 2, 'bar' => '> 1'
     end