ports/170920: Update to databases/py-carbon

[edwin at FreeBSD.org]

Synopsis: Update to databases/py-carbon

Responsible-Changed-From-To: freebsd-ports-bugs->freebsd-python
Responsible-Changed-By: edwin
Responsible-Changed-When: Thu Aug 23 15:00:45 UTC 2012
Responsible-Changed-Why: 
freebsd-python@ wants this port PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=170920