upgrade Rails 3.2.13

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11649 e93f8b46-1217-0410-a6f0-8f06a7374b81

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'rails', '3.2.12'
+gem "rails", "3.2.13"
 gem "jquery-rails", "~> 2.0.2"
 gem "i18n", "~> 0.6.0"
 gem "coderay", "~> 1.0.6"