busybox/50default: Start with the metric of 10 for the IDU

For wlan and ppp we want to be able to install another default
route and this is only possible if we can use smaller metrics.

recipes-core/busybox/busybox_sysmocom.inc

@@ -1,6 +1,6 @@
 SYSMOCOM := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
 FILESEXTRAPATHS_prepend := "${SYSMOCOM}/busybox-${SYSMOCOM_ORIG_PV}:${SYSMOCOM}/files:"
-PRINC = "23"
+PRINC = "24"
 
 SRC_URI += "file://busybox-ifplugd.sh \
             file://ifplugd.sh"

recipes-core/busybox/files/sysmocom-idu/simple.script

@@ -54,7 +54,7 @@ case "$1" in
                                 fi
 			fi
 
-			metric=0
+			metric=10
 			for i in $router ; do
                                 if [ $have_bin_ip -eq 1 ]; then
                                         ip route add default via $i metric $metric