Native Client side changes for debugging support: stdout/err -> postmessage.

SConstruct

 #! -*- python -*-
 # Copyright (c) 2011 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 3199 matching lines @@
     'tests/mmap/nacl.scons',
     'tests/nacl_log/nacl.scons',
     'tests/nameservice/nacl.scons',
     'tests/nanosleep/nacl.scons',
     'tests/native_worker/nacl.scons',
     'tests/noop/nacl.scons',
     'tests/nrd_xfer/nacl.scons',
     'tests/nthread_nice/nacl.scons',
     'tests/null/nacl.scons',
     'tests/nullptr/nacl.scons',
+    'tests/postmessage_redir/nacl.scons',
     'tests/pnacl_abi/nacl.scons',
     'tests/pnacl_client_translator/nacl.scons',
     'tests/redir/nacl.scons',
     'tests/rodata_not_writable/nacl.scons',
     'tests/signal_handler/nacl.scons',
     'tests/sbrk/nacl.scons',
     'tests/srpc/nacl.scons',
     'tests/srpc_hw/nacl.scons',
     'tests/srpc_message/nacl.scons',
     'tests/stack_alignment/nacl.scons',
@@ skipping 547 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:')