Make Mac-port non-blocking.

runtime/bin/socket_macos.cc

Index: runtime/bin/socket_macos.cc
diff --git a/runtime/bin/socket_macos.cc b/runtime/bin/socket_macos.cc
index 2e336a2003709fd5377c29f150d1f5b1a6aa7174..e54cc591fe72db61394e30d7708a9028ff019191 100644
--- a/runtime/bin/socket_macos.cc
+++ b/runtime/bin/socket_macos.cc
@@ -58,6 +58,7 @@ static intptr_t Create(const RawAddr& addr) {
     return -1;
   }
   FDUtils::SetCloseOnExec(fd);
+  FDUtils::SetNonBlocking(fd);
   return fd;
 }
 
@@ -79,8 +80,6 @@ intptr_t Socket::CreateConnect(const RawAddr& addr) {
     return fd;
   }
 
-  FDUtils::SetNonBlocking(fd);
-
   return Connect(fd, addr);
 }