* lib/rubygems*: Updated to RubyGems 2.0

* test/rubygems*:  ditto.

* common.mk (prelude):  Updated for RubyGems 2.0 source rearrangement.

* tool/change_maker.rb:  Allow invalid UTF-8 characters in source
  files.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37976 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/package_task.rb

@@ -20,6 +20,7 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 require 'rubygems'
+require 'rubygems/package'
 begin
   gem 'rake'
 rescue Gem::LoadError
@@ -43,13 +44,10 @@ require 'rake/packagetask'
 #   require 'rubygems/package_task'
 #
 #   spec = Gem::Specification.new do |s|
-#     s.platform = Gem::Platform::RUBY
 #     s.summary = "Ruby based make-like utility."
 #     s.name = 'rake'
 #     s.version = PKG_VERSION
 #     s.requirements << 'none'
-#     s.require_path = 'lib'
-#     s.autorequire = 'rake'
 #     s.files = PKG_FILES
 #     s.description = <<-EOF
 #   Rake is a Make-like program implemented in Ruby. Tasks
@@ -113,7 +111,8 @@ class Gem::PackageTask < Rake::PackageTask
     file gem_path => [package_dir, gem_dir] + @gem_spec.files do
       chdir(gem_dir) do
         when_writing "Creating #{gem_spec.file_name}" do
-          Gem::Builder.new(gem_spec).build
+          Gem::Package.build gem_spec
+
           verbose trace do
             mv gem_file, '..'
           end