this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Uwe Kleine-König <email@example.com>
Date: Thu Aug 10 17:20:06 2017 +0200
[debian] drop useless Signed-off-by from d/patches
The Signed-off-by isn't formalized for rt-tests, so better don't use it.