ports/122502: Update port: math/gretl to 1.7.4

[miwi at FreeBSD.org]

Synopsis: Update port: math/gretl to 1.7.4

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: miwi
Responsible-Changed-When: Sun Apr 6 17:11:04 UTC 2008
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=122502