[autotest] Update to compile against new libchrome

client/site_tests/platform_MiniJailUidGid/src/platform_MiniJailUidGid.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 
 #include "base/command_line.h"
 
 // Verifies that the process group id is what is expected.
 void CheckGid(uid_t gid) {
   uid_t rgid;
   uid_t egid;
   uid_t sgid;
   if (getresgid(&rgid, &egid, &sgid) != 0) {
@@ skipping 33 matching lines @@
     CheckUid(static_cast<uid_t>(uid));
   }
 
   if(cmd_line->HasSwitch("checkGid")) {
     int gid = atoi(cmd_line->GetSwitchValueASCII("checkGid").c_str());
     CheckGid(static_cast<uid_t>(gid));
   }
 
   return 0;
 }