ports/187130: lang/ironpython: unbreak relative paths for xbuild

[edwin at FreeBSD.org]

Synopsis: lang/ironpython: unbreak relative paths for xbuild

Responsible-Changed-From-To: freebsd-ports-bugs->mva
Responsible-Changed-By: edwin
Responsible-Changed-When: Sat Mar 1 18:21:04 UTC 2014
Responsible-Changed-Why: 
Submitter is maintainer and has GNATS access (via the GNATS Auto Assign
Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=187130