Disable upstart builds until we find a proper build reliability fix

src/scripts/build_platform_packages.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
@@ skipping 19 matching lines @@
                memento_softwareupdate pam_google window_manager \
                cros chrome screenlocker cryptohome \
                monitor_reconfig microbenchmark minijail metrics_collection \
                theme metrics_daemon"
 
 THIRD_PARTY_DIR="$SRC_ROOT/third_party"
 THIRD_PARTY_PACKAGES="e2fsprogs/files flimflam \
                       gflags google-breakpad gpt gtest \
                       ibus ibus-chewing ibus-anthy ibus-hangul ibus-m17n \
                       ply-image slim/src synaptics \
-                      upstart/files wpa_supplicant \
+                      wpa_supplicant \
                       xscreensaver/xscreensaver-5.08 xserver-xorg-core \
                       xserver-xorg-video-intel"
 
 if [ $FLAGS_stable -eq $FLAGS_TRUE ]
 then
   # Passed to copy_chrome_zip.sh to get stable version of the browser
   export GET_STABLE_CHROME=1
 fi
 
 # Build dh-chromeos really first. Some of third_party needs it.
@@ skipping 26 matching lines @@
 # Build platform packages
 for i in $PLATFORM_DIRS
 do
   echo "Building package ${i}..."
   cd "$PLATFORM_DIR/$i"
   ./make_pkg.sh
   cd -
 done
 
 echo "All packages built."