add NEWS for Random.urandom [ci skip]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
add NEWS for Random.urandom [ci skip]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e