MinSFI: Passing arguments to the entry function

tests/minsfi/sandbox_invoke_args.c

 /*
  * Copyright (c) 2014 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-/* Just test that these headers can be #included. */
-#include <irt.h>
-#include <irt_dev.h>
+#include <stdlib.h>
 
-int main(void) {
-  return 0;
+int main(int argc, char **argv) {
+  int i, sum = 0;
+  for (i = 0; i < argc; ++i)
+    sum += strtol(argv[i], 0, 0);
+  return sum;
 }