[1.0.X] Added GeoDjango template and test data directories to the manifest...

[1.0.X] Added GeoDjango template and test data directories to the manifest template so that they are included when building the release tarball with `sdist`.

Backport of r9473 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9474 bcc190cf-cafb-0310-a4f2-bffc1f526a37