ports/164687: www/firefox: build fails on check-sync-dirs.py - partial build fix

[edwin at FreeBSD.org]

Synopsis: www/firefox: build fails on check-sync-dirs.py - partial build fix

Responsible-Changed-From-To: freebsd-ports-bugs->gecko
Responsible-Changed-By: edwin
Responsible-Changed-When: Wed Feb 1 08:50:18 UTC 2012
Responsible-Changed-Why: 
Over to maintainer (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=164687