Merge pull request crystal-lang#806 from bnoordhuis/fix-tcpsocket-test

Fix bad assumption in TCPSocket.new test

Author: Ary Borenszweig

spec/std/socket_spec.cr

@@ -89,7 +89,7 @@ describe "TCPSocket" do
   end
 
   it "fails when host doesn't exist" do
-    expect_raises(SocketError, /^getaddrinfo: .+ not known$/) do
+    expect_raises(SocketError, /^getaddrinfo: (.+ not known|no address .+)$/i) do
       TCPSocket.new("localhostttttt", 12345)
     end
   end