Ruby

test_nonblock.rb: fix failure on OSX

• test/socket/test_nonblock.rb (test_recvfrom_nonblock_no_exception):
  no destination to already connected socket. fix failure on OSX.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50916 b2dd03c8-39d4-4d8f-98ff-823fe69b080e