Correction XDP file path, wwan_loop service and add hotplug iface wwan script

XDP file path was in the var folder which is a virtual link to tmp folder.

add hotplug script to put the script xdp on the interface wwan when the command ifup -a wwan0 is called.

wwan_loop service crash on the launch, because it launched before the interface wwan set up.

files/etc/hotplug.d/iface/99-ifup-wwan

@@ -0,0 +1,7 @@
+#!/bin/sh
+[ "$ACTION" = "ifup" -a "$DEVICE" = "wwan0" ] && {
+    logger "iface wwan0 up detected, loading XDP..."
+    ip link set dev wwan0 xdp obj /usr/local/share/xdp/xdp_udp.o sec xdp_udp
+}
+exit 0
+

files/usr/sbin/wwan_loop

@@ -1,3 +1,6 @@
 #!/bin/sh
 
+while true; do
   mmcli --modem 0 --monitor-state | while read r ; do /usr/sbin/wwan_reconnect ; done
+  sleep 5
+done