ports/168588: audio/csound: Update to version 5.17.11

[sylvio at FreeBSD.org]

Synopsis: audio/csound: Update to version 5.17.11

Responsible-Changed-From-To: freebsd-ports-bugs->sylvio
Responsible-Changed-By: sylvio
Responsible-Changed-When: Sat Jun 2 22:00:38 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=168588