Fix bad require for rake test

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3541 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/test/controller/routing_test.rb

 require File.dirname(__FILE__) + '/../abstract_unit'
 require 'test/unit'
-require 'fake_controllers'
+require File.dirname(__FILE__) + '/fake_controllers'
 require 'stringio'
 
 RunTimeTests = ARGV.include? 'time'