ports/135994: Fix lang/mono-basic to obey PREFIX

[FreeBSD-gnats-submit at FreeBSD.org]

Thank you very much for your problem report.
It has the internal identification `ports/135994'.
The individual assigned to look at your
report is: freebsd-ports-bugs. 

You can access the state of your problem report at any time
via this link:

http://www.freebsd.org/cgi/query-pr.cgi?pr=135994

>Category:       ports
>Responsible:    freebsd-ports-bugs
>Synopsis:       Fix lang/mono-basic to obey PREFIX
>Arrival-Date:   Wed Jun 24 08:50:01 UTC 2009