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>

boot/barebox/barebox.mk

@@ -28,7 +28,7 @@ $(1)_SITE_METHOD = git
 else
 # Handle stable official Barebox versions
 $(1)_SOURCE = barebox-$$($(1)_VERSION).tar.bz2
-$(1)_SITE = http://www.barebox.org/download
+$(1)_SITE = https://www.barebox.org/download
 endif
 
 $(1)_DEPENDENCIES = host-lzop