secur32/tests: Relax the certificate check a little.

dlls/secur32/tests/schannel.c

@@ -640,7 +640,7 @@ static void test_remote_cert(PCCERT_CONTEXT remote_cert)
         cert_cnt++;
     }
 
-    ok(cert_cnt == 3, "cert_cnt = %u\n", cert_cnt);
+    ok(cert_cnt == 2 || cert_cnt == 3, "cert_cnt = %u\n", cert_cnt);
     ok(incl_remote, "context does not contain cert itself\n");
 }