The ring hook was blocking the notification writing.

The hook must be run asynchronously. This allow ringtones to be played
using mpv by exemple.

Signed-off-by: Reed Wade <reedwade@misterbanal.net>
Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>

scripts/modem/sxmo_modemmonitor.sh

@@ -69,7 +69,7 @@ checkforincomingcalls() {
 	INCOMINGNUMBER=$(lookupnumberfromcallid "$VOICECALLID")
 
 	if [ -x "$XDG_CONFIG_HOME/sxmo/hooks/ring" ]; then
-		"$XDG_CONFIG_HOME/sxmo/hooks/ring" "$(sxmo_contacts.sh | grep -E "^\\$INCOMINGNUMBER")"
+		"$XDG_CONFIG_HOME/sxmo/hooks/ring" "$(sxmo_contacts.sh | grep -E "^\\$INCOMINGNUMBER")" &
 	else
 		sxmo_vibratepine 2500 &
 	fi