ports/185343: emulators/gens: Update to version 2.15.5

[danilo at FreeBSD.org]

Synopsis: emulators/gens: Update to version 2.15.5

Responsible-Changed-From-To: freebsd-ports-bugs->danilo
Responsible-Changed-By: danilo
Responsible-Changed-When: Tue Dec 31 03:08:35 UTC 2013
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=185343