Disable errors when we try to compile the pthread example with esperanto

Currently, the Cosmopolitan/Esperanto toolchain protects the usage of
pthread and we are not able to pass to it 0. This patch allows us to
compile (and recognize the support of pthread) the code with the
esperanto toolchain.

src/unix/config/discover.ml

@@ -417,7 +417,7 @@ struct
 
           int main()
           {
-              pthread_create(0, 0, 0, 0);
+              pthread_create(1, 1, 1, 1);
               return 0;
           }
         |}