Fix Unexpected crash_sender stdout/stderr when testing Official image

crash_sender

 #!/bin/sh
 
 # Copyright (c) 2010 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.
 
 set -e
 
 # Product ID in crash report
 CHROMEOS_PRODUCT=ChromeOS
@@ skipping 76 matching lines @@
   # This could just be an unrelated process, but it's ok to be conservative.
   lecho "Already running.  Exiting now."
   exit 1
 }
 
 get_version() {
   grep ^CHROMEOS_RELEASE_VERSION /etc/lsb-release | cut -d = -f 2-
 }
 
 is_official() {
-  grep ^CHROMEOS_RELEASE_DESCRIPTION /etc/lsb-release | cut -d = -f 2- | \
-      grep Official
+  grep ^CHROMEOS_RELEASE_DESCRIPTION /etc/lsb-release | grep -q Official
 }
 
 # Generate a uniform random number in 0..max-1.
 generate_uniform_random() {
   local max=$1
   local random="$(od -An -N4 -tu /dev/urandom)"
   echo $((random % max))
 }
 
 is_feedback_disabled() {
@@ skipping 155 matching lines @@
   TMP_DIR="$(mktemp -d /tmp/crash_sender.XXXX)"
 
   # Send system-wide crashes
   send_crashes "/var/spool/crash"
 
   # Send user-specific crashes
   send_crashes "/home/chronos/user/crash"
 }
 
 main