Support 64-bit reserved_at_zero value nacl-side

src/trusted/service_runtime/linux/reserved_at_zero.c

 /*
  * Copyright (c) 2012 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.
  */
 
 #include "native_client/src/shared/platform/nacl_log.h"
 #include "native_client/src/trusted/service_runtime/sel_addrspace.h"
 
 /*
- * The launcher passes --reserved_at_zero=0xXXXXXXXX.  nacl_helper_bootstrap
- * replaces the Xs wih the size of the prereserved sandbox memory.
+ * The launcher passes --reserved_at_zero=0xXXXXXXXXXXXXXXXX.
+ * nacl_helper_bootstrap replaces the Xs wih the size of the
+ * prereserved sandbox memory.
  */
 void NaClHandleReservedAtZero(const char *switch_value) {
   char *endp = NULL;
   size_t prereserved_sandbox_size = (size_t) strtoul(switch_value, &endp, 0);
   if (*endp != '\0') {
     NaClLog(LOG_FATAL, "NaClHandleReservedAtZero: Could not parse"
             " reserved_at_zero argument value of %s\n", switch_value);
   }
   g_prereserved_sandbox_size = prereserved_sandbox_size;
 }