Fixed #9751: admin scripts now calculate the project directory correctly when...

Fixed #9751: admin scripts now calculate the project directory correctly when the settings module is a directory with an ``__init__.py``. Thanks to Eric Holscher.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10751 bcc190cf-cafb-0310-a4f2-bffc1f526a37