From e398a00 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 26 Dec 2017 18:09:35 +0100
Subject: [PATCH 4/4] build: fix that LZO file is always rebuilt

Port the make-cmd from linux kernel.
with the updated version $$ is porperly escaped, thus
the LZO rule works as intended.
And we avoid rebuilds when not required

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>