DEVELOPERS: add Heiko Thiery for package/rauc
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit 6bec87810252d123f768af03e0e2ab53d2b61f03)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>