imx-uuc: fix start-stop-daemon stop failure

The daemon service script associated with imx-uuc failed to stop the daemon
since the PID of the process wasn't stored at start time.

Adding -m option allowed to create the uuc.pid file as expected.

Signed-off-by: Alexandre Esse <alexandre.esse.dev@gmail.com>
Reviewed-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 41e86cd5ca)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/freescale-imx/imx-uuc/S80imx-uuc

@@ -6,7 +6,7 @@ DAEMON=/usr/bin/$NAME
 case "$1" in
     start)
 	printf "Starting $NAME: "
-	start-stop-daemon -S -q -b -p /var/run/${NAME}.pid -x $DAEMON
+	start-stop-daemon -S -q -b -m -p /var/run/${NAME}.pid -x $DAEMON
 	[ $? = 0 ] && echo "OK" || echo "FAIL"
 	;;
     stop)