[1.1.X] Fixed #12675 - Add the admin app to the project template settings.py...

[1.1.X] Fixed #12675 - Add the admin app to the project template settings.py for consistency with the urls.py. Thanks, stephanhoyer.

Backport of r12464.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12481 bcc190cf-cafb-0310-a4f2-bffc1f526a37