Move is_whitelisted to the common script so that all users get the previous fix

src/scripts/package_script_whitelist.sh

 #!/bin/bash
 
 # 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.
 
 # This script is used to maintain the whitelist for package maintainer scripts.
 # If a package maintainer script is in the whitelist file then it is ok to skip
 # running that maintainer script when installing the package. Otherwise there
 # should be an equivalent script that can perform those operation on a target
@@ skipping 29 matching lines @@
          given rootfs. This will show you the files in turn and give you
          the option to Skip/View/Whitelist/Create template for the script.
          If --file is given it will do the same for that one file.
   check: Checks if the --file= is in the whitelist.
 "
 
 # Parse command line
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
-# Returns true if the input file is whitelisted.
-#
-# $1 - The file to check
-is_whitelisted() {
-  local file=$1
-  local whitelist="$FLAGS_whitelist"
-  test -f "$whitelist" || return
-
-  local checksum=$(md5sum "$file" | awk '{ print $1 }')
-  local count=$(grep -c "$checksum" "${whitelist}" || /bin/true)
-  test $count -ne 0
-}
-
 # Adds a the file at the given path to the whitelist.
 #
 # $1 - Path to file to add to whitelist.
 add_to_whitelist() {
   local path=$1
   local whitelist="$FLAGS_whitelist"
   local file=$(basename "$path")
 
   local checksum=$(md5sum "$path" | awk '{ print $1 }')
   if [ ! -f "$whitelist" ]; then
@@ skipping 141 matching lines @@
     if is_whitelisted "$FLAGS_file"; then
       echo "Whitelisted"
     else
       echo "Not whitelisted"
     fi
     ;;
   *)
   echo "Unknown command."
   ;;
 esac