boot/barebox: change download site to https
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 2cf068864708285c6bc7cffffc38be17aa376c49)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>