package/mender: remove single hyphen command

Single hyphen commands has been removed since Mender 3.0.0 [1]

[1] https://github.com/mendersoftware/mender/commit/fd838ec1b08f3d429b1d81607e9c35a87a104ee6

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Cc: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/mender/S42mender

@@ -25,7 +25,7 @@ start() {
 	umask 077
 
 	start-stop-daemon -S -q -b -m -p /var/run/mender.pid \
-		--exec /usr/bin/mender -- -daemon
+		--exec /usr/bin/mender -- daemon
 	[ $? = 0 ] && echo "OK" || echo "FAIL"
 }
 stop() {

package/mender/mender-client.service

@@ -17,7 +17,7 @@ if [ -L /var/lib/mender \
         mkdir -p "$(readlink /var/lib/mender)"; \
     fi; \
 fi'
-ExecStart=/usr/bin/mender -daemon
+ExecStart=/usr/bin/mender daemon
 Restart=on-abort
 
 [Install]