ports/178391: [patch] textproc/docbook: fix typo in makefile

[edwin at FreeBSD.org]

Synopsis: [patch] textproc/docbook: fix typo in makefile

Responsible-Changed-From-To: freebsd-ports-bugs->gabor
Responsible-Changed-By: edwin
Responsible-Changed-When: Tue May 7 10:00:08 UTC 2013
Responsible-Changed-Why: 
Over to maintainer (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=178391