Make Syzygy ordering file optional for official archival.

chrome/tools/build/win/FILES.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is a buildbot configuration file containing a tagged list of files
 # processed by the stage/archive scripts. The known tags are:
 #
@@ skipping 417 matching lines @@
     'buildtype': ['official'],
     'archive': 'remoting-win32.zip',
   },
   # Syzygy modified binaries and related files. Only add to this section if you
   # know what you're doing! The build configuration has to be modified to run
   # Syzygy on the target in question before adding a staging dependency here!
   {
     'filename': 'chrome.dll-order.json',
     'arch': ['32bit'],
     'buildtype': ['dev', 'official'],
-    'optional': ['dev'],
+    'optional': ['dev', 'official'],
   },
   {
     'filename': 'chrome_child.dll-order.json',
     'arch': ['32bit'],
     'buildtype': ['dev', 'official'],
     'optional': ['dev', 'official'],
   },
   {
     'filename': 'syzygy/chrome.dll',
     'arch': ['32bit'],
@@ skipping 184 matching lines @@
     'arch': ['32bit'],
     'buildtype': ['official'],
     'archive': 'chrome-win32-nacl-irt-syms.zip',
   },
   {
     'filename': 'nacl_irt_x86_64.nexe.debug',
     'buildtype': ['official'],
     'archive': 'chrome-win32-nacl-irt-syms.zip',
   },
 ]