fff-hoodutils: Adjust upgrade path function for changed folder structure

As we now have multiple variants, the binaries on the update server
should be seperated into different directories.

To allow the firmware to decide which variant it wants to download,
the "$VARIANT/current" part is removed from the hoodfiles. Instead
it is added inside the upgrade path function in fff-hoodutils.

Signed-off-by: Fabian Bläse <fabian@blaese.de>
Reviewed-by: Christian Dresel <fff@chrisi01.de>

src/packages/fff/fff-hoodutils/files/lib/functions/fff/keyxchange

@@ -2,6 +2,7 @@
 # License GPLv3
 
 . /usr/share/libubox/jshn.sh
+. /etc/firmware_release
 
 hoodfiletmp="/tmp/hoodfile"
 hoodfileref="/tmp/hoodfileref"
@@ -21,14 +22,19 @@ getJsonPath() {
 
 getUpgradePath() {
 	jsonfile="$(getJsonPath)"
+	local upgrade_path
 
 	if [ -n "$jsonfile" ] ; then
 		json_load "$(cat "$jsonfile")"
 		json_select hood
 		json_get_var upath upgrade_path
-		echo "$upath"
+		upgrade_path="$upath"
 	else
 		return 1
 	fi
+
+	# add full firmware path for current firmwares variant
+	echo "${upgrade_path}/${VARIANT}/current"
+
 	return 0
 }