Add a scons pnacl finalize step for pnacl_generate_pexe tests.

site_scons/site_tools/component_setup.py

 #!/usr/bin/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.
 
 """Main setup for software construction toolkit.
 
 This module is a SCons tool which should be include in all environments.
 It is used as follows:
   env = Environment(tools = ['component_setup'])
@@ skipping 189 matching lines @@
         RANLIBCOMSTR='________Indexing $TARGET',
         RCCOMSTR='________Compiling resource $TARGET',
         SHCCCOMSTR='________Compiling $TARGET',
         SHCXXCOMSTR='________Compiling $TARGET',
         SHLINKCOMSTR='________Linking $TARGET',
         SHMANIFEST_COMSTR='________Updating manifest for $TARGET',
         # Strip doesn't seem to be a first-class citizen in SCons country,
         # so we have to add these *COM, *COMSTR manually.
         STRIPCOMSTR='________Stripping to create $TARGET',
         TRANSLATECOMSTR='________Translating $TARGET',
+        PNACLFINALIZECOMSTR='________Finalizing pexe $TARGET',
     )
 
   # Add other default tools from our toolkit
   # TODO: Currently this needs to be before SOURCE_ROOT in case a tool needs to
   # redefine it.  Need a better way to handle order-dependency in tool setup.
   for t in component_setup_tools:
     env.Tool(t)
 
   # The following environment replacements use env.Dir() to force immediate
   # evaluation/substitution of SCons variables.  They can't be part of the
@@ skipping 15 matching lines @@
   # have a common location for tools outside of the current clientspec.  Need
   # to check if it's defined already, so it can be set prior to this tool
   # being included.
   tool_root = env.get('TOOL_ROOT', '$SOURCE_ROOT')
   env['TOOL_ROOT'] = env.Dir(tool_root).abspath
 
   # Defer pre-evaluating some environment variables, but do before building
   # SConscripts.
   env.Defer(PreEvaluateVariables)
   env.Defer('BuildEnvironmentSConscripts', after=PreEvaluateVariables)