Just skip localized search plugins we don't have a langpack for.

The TBB 4.x esr31-nightly we doesn't ship localized versions (from
which we extract the langpacks) for several search plugins that we
expect to have them for.

This commit should be reverted once more localized versions are
available again.

config/chroot_local-hooks/14-add_localized_browser_searchplugins

@@ -24,7 +24,7 @@ for LANGUAGE in $(find /usr/share/amnesia/browser/searchplugins/locale -maxdepth
 	LOCALES="$(locales_for_lang "$LANGUAGE")"
 	if [ -z "$LOCALES" ]; then
 		echo "Unable to find a matching locale for $LANGUAGE." >&2
-		exit 1
+		continue
 	fi
 	for LOCALE in $LOCALES; do
 		mkdir -p "${TBB_INSTALL}"/Browser/distribution/searchplugins/locale/$LOCALE