ports/180545: update sysutils/rubygem-facter to 1.7.2

[swills at FreeBSD.org]

Synopsis: update sysutils/rubygem-facter to 1.7.2

Responsible-Changed-From-To: ruby->swills
Responsible-Changed-By: swills
Responsible-Changed-When: Fri Jul 19 13:06:16 UTC 2013
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=180545