add new usability wrapper /usr/bin/dpkg-noninteractive

freedomofpress/securedrop-workstation#428

usr/bin/dpkg-noninteractive

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+## Copyright (C) 2012 - 2018 ENCRYPTED SUPPORT LP <[email protected]>
+## See the file COPYING for copying conditions.
+
+set -e
+
+[ -n "$POLICYRCD" ] || POLICYRCD="/usr/share/usability-misc/policy-rc.d"
+[ -n "$DEBIAN_FRONTEND" ] || DEBIAN_FRONTEND="noninteractive"
+[ -n "$DEBIAN_PRIORITY" ] || DEBIAN_PRIORITY="critical"
+[ -n "$DEBCONF_NOWARNINGS" ] || DEBCONF_NOWARNINGS="yes"
+[ -n "$APT_LISTCHANGES_FRONTEND" ] || APT_LISTCHANGES_FRONTEND="text"
+export POLICYRCD DEBIAN_FRONTEND DEBIAN_PRIORITY DEBCONF_NOWARNINGS APT_LISTCHANGES_FRONTEND
+
+dpkg --force-confnew "$@"