initram: beep before prompting for password

initramfs-init

@@ -83,7 +83,8 @@ unpack_apkovl() {
 		return 1
 	fi
 	local count=0
-	echo ""
+	# beep
+	echo -e "\007"
 	while [ $count -lt 3 ]; do
 		openssl enc -d -$suffix -in "$ovl" | tar -C "$dest" -zx \
 			2>/dev/null && return 0