Added yet another missing with_statement import. Thanks, Florian Apolloner.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17248 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/archive.py

@@ -21,6 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 """
+from __future__ import with_statement
 import os
 import shutil
 import sys