* ext/socket/raddrinfo.c (nogvl_getaddrinfo): work around for Ubuntu
  13.04's getaddrinfo issue with mdns4. [ruby-list:49420]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41215 b2dd03c8-39d4-4d8f-98ff-823fe69b080e