Library stubs didn't work for autorequires that are under subdirector…

…ies. Fixed. Hard to test unfortunately.

git-svn-id: http://rubygems.rubyforge.org/svn/trunk@251 3d4018f9-ac1a-0410-99e9-8a154d859a19

rubygems/lib/rubygems/installer.rb

@@ -153,7 +153,7 @@ def generate_library_stubs(spec)
             FileUtils.mkdir_p File.dirname(target_file)
           end
             File.open(target_file, "w", 0644) do |file|
-              file.write(library_stub_text(spec.name, File.basename(target_file)))
+              file.write(library_stub_text(spec.name, target_file.sub(/#{Config::CONFIG['sitelibdir']}\//, "")))
             end
           end
         else