ports/171969: benchmarks/postmark: Update to version 1.53

[sperber at FreeBSD.org]

Synopsis: benchmarks/postmark: Update to version 1.53

Responsible-Changed-From-To: freebsd-ports-bugs->sperber
Responsible-Changed-By: sperber
Responsible-Changed-When: Mon Oct 29 17:55:54 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=171969