jmavsim_run.sh: enable SDK UDP port

We forgot to add the option -s for jmavsim_run.sh which starts jMAVSim
with the UDP port connecting to the SDK (port 14540).

Tools/jmavsim_run.sh

@@ -10,7 +10,7 @@ extra_args=
 baudrate=921600
 device=
 ip="127.0.0.1"
-while getopts ":b:d:p:qr:f:i:l" opt; do
+while getopts ":b:d:p:qsr:f:i:l" opt; do
 	case $opt in
 		b)
 			baudrate=$OPTARG
@@ -27,6 +27,9 @@ while getopts ":b:d:p:qr:f:i:l" opt; do
 		q)
 			extra_args="$extra_args -qgc"
 			;;
+		s)
+			extra_args="$extra_args -sdk"
+			;;
 		r)
 			extra_args="$extra_args -r $OPTARG"
 			;;