ports/188775: Update databases/riak to 1.4.8

[linimon at FreeBSD.org]

Synopsis: Update databases/riak to 1.4.8

State-Changed-From-To: feedback->open
State-Changed-By: linimon
State-Changed-When: Sun Apr 20 00:39:14 UTC 2014
State-Changed-Why: 
Maintainer approved.

http://www.freebsd.org/cgi/query-pr.cgi?pr=188775