Merge branch 'fix-broken-ee-master-prepend-todos-api' into 'master'

Adds EE prepend, which for some reason was missing

See merge request gitlab-org/gitlab-ce!31851

lib/api/todos.rb

@@ -110,3 +110,5 @@ module API
     end
   end
 end
+
+API::Todos.prepend_if_ee('EE::API::Todos')