* ext/socket/socket.c (sock_s_getnameinfo): Save errno for EAI_SYSTEM.
  Reported by Saravana kumar.  [ruby-core:61820] [Bug #9697]
  Fixed by Heesob Park.  [ruby-core:61868]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e