ports/168591: cad/xcircuit: Update to version 3.7.40

[sylvio at FreeBSD.org]

Synopsis: cad/xcircuit: Update to version 3.7.40

Responsible-Changed-From-To: freebsd-ports-bugs->sylvio
Responsible-Changed-By: sylvio
Responsible-Changed-When: Sat Jun 2 22:00:59 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=168591