ports/142848: Update for math/GiNaC

[wen at FreeBSD.org]

Synopsis: Update for math/GiNaC

Responsible-Changed-From-To: freebsd-ports-bugs->wen
Responsible-Changed-By: wen
Responsible-Changed-When: Fri Jan 15 04:07:14 UTC 2010
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=142848