Support 64-bit reserved_at_zero value nacl-side

SConstruct

 #! -*- python -*-
 # 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.
 
 import atexit
 import glob
 import os
 import platform
 import shutil
@@ skipping 1165 matching lines @@
 
   trusted_env = env['TRUSTED_ENV']
   return trusted_env.File('${STAGING_DIR}/${PROGPREFIX}sel_ldr${PROGSUFFIX}')
 
 pre_base_env.AddMethod(GetSelLdr)
 
 def GetBootstrap(env):
   if 'TRUSTED_ENV' in env:
     trusted_env = env['TRUSTED_ENV']
     if trusted_env.Bit('linux'):
+      template_digits = 'X' * 16
       return (trusted_env.File('${STAGING_DIR}/nacl_helper_bootstrap'),
-              ['--r_debug=0xXXXXXXXXXXXXXXXX', '--reserved_at_zero=0xXXXXXXXX'])
+              ['--r_debug=0x' + template_digits,
+               '--reserved_at_zero=0x' + template_digits])
   return None, None
 
 pre_base_env.AddMethod(GetBootstrap)
 
 def AddBootstrap(env, executable, args):
   bootstrap, bootstrap_args = env.GetBootstrap()
   if bootstrap is None:
     return [executable] + args
   else:
     return [bootstrap, executable] + bootstrap_args + args
@@ skipping 2815 matching lines @@
   nacl_env.ValidateSdk()
 
 if BROKEN_TEST_COUNT > 0:
   msg = "There are %d broken tests." % BROKEN_TEST_COUNT
   if GetOption('brief_comstr'):
     msg += " Add --verbose to the command line for more information."
   print msg
 
 # separate warnings from actual build output
 Banner('B U I L D - O U T P U T:')