Add check for dpkg info and mkdir if it doesn't exist

src/scripts/dpkg_no_scripts.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.
 
 # This script can be used to replace the "dpkg" binary as far as the
 # "apt-get install" command is concerned. When "apt-get install foo"
 # runs it will make two calls to dpkg like:
 #   dpkg --status-fd ## --unpack --auto-deconfigure /path/to/foo.deb
@@ skipping 93 matching lines @@
 
   if [ -n "$fallback_packages" ]; then
     dpkg --root="$FLAGS_root" --configure $fallback_packages
   fi
 }
 
 do_unpack() {
   local dpkg_status="$FLAGS_root/var/lib/dpkg/status"
   local dpkg_info="$FLAGS_root/var/lib/dpkg/info/"
 
+  if [ ! -d "$dpkg_info" ]
+  then
+    mkdir -p "$dpkg_info"
+  fi
+
   for p in "$@"; do
     local package=$(dpkg-deb --field "$p" Package)
     local tmpdir=$(mktemp -d)
 
     dpkg-deb --control "$p" "$tmpdir"
 
     local preinst="${tmpdir}/preinst"
     local postinst="${tmpdir}/postinst"
     if has_missing_whitelist "$package" "$preinst" "$postinst"; then
       if [ $FLAGS_dpkg_fallback -eq $FLAGS_TRUE ]; then
@@ skipping 46 matching lines @@
   do_unpack $@
 elif [ $FLAGS_remove -eq $FLAGS_TRUE ]; then
   # We log but ignore remove requests.
   echo "Ignoring remove: $@"
 else
   echo "dpkg_no_scripts.sh: Unknown or missing command."
   exit 1
 fi
 
 exit 0