ports/187543: Update lang/nawk to version 20121220

[pawel at FreeBSD.org]

Synopsis: Update lang/nawk to version 20121220

Responsible-Changed-From-To: freebsd-ports-bugs->pawel
Responsible-Changed-By: pawel
Responsible-Changed-When: Sun Mar 30 11:50:03 UTC 2014
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=187543