Fix the notification for outgoing call hanged up by the contact

There was a hole in the event logging where we start a call that the
contact hang up. As we dont have an event for outgoing call,
modemmonitor think this is a missed call.

Adding a dedicated event file help modemmonitor to know what happen.

Signed-off-by: Stacy Harper <contact@stacyharper.net>
Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>

scripts/modem/sxmo_modemcall.sh

@@ -106,6 +106,7 @@ acceptcall() {
 	)"
 	if [ "$DIRECTION" = "outgoing" ]; then
 		modem_cmd_errcheck -m "$(modem_n)" -o "$CALLID" --start
+		touch "$CACHEDIR/${CALLID}.initiatedcall" #this signals that we started this call
 		log_event "call_start" "$CALLID"
 		echo "sxmo_modemcall: Started call $CALLID">&2
 	elif [ "$DIRECTION" = "incoming" ]; then