Close fds.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46216 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-05-29

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46217 b2dd03c8-39d4-4d8f-98ff-823fe69b080e