ports/154186: Fix Mk infrastructure to allow using linux 2.4 emulation with FreeBSD > 8.0

[ale at FreeBSD.org]

Synopsis: Fix Mk infrastructure to allow using linux 2.4 emulation with FreeBSD > 8.0

Responsible-Changed-From-To: freebsd-ports-bugs->portmgr
Responsible-Changed-By: ale
Responsible-Changed-When: Fri Jan 21 08:32:18 UTC 2011
Responsible-Changed-Why: 
Mk is portmgr territory.

http://www.freebsd.org/cgi/query-pr.cgi?pr=154186