[Feature][YUKUAI_patch]add 18.02 code

Only Configure: No
Affected branch: master
Affected module: unknow
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: Yes
Doc Update: No

Change-Id: I7f71153004f10fc0ea5adfa083866aaeeb1053ac
diff --git a/rootfs/sbin/routef b/rootfs/sbin/routef
new file mode 100755
index 0000000..c251e7b
--- /dev/null
+++ b/rootfs/sbin/routef
@@ -0,0 +1,10 @@
+#! /bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+if [ -z "$*" ] ; then
+	exec ip -4 ro flush  scope global  type unicast
+else
+	echo "Usage: routef"
+	echo
+	echo "This script will flush the IPv4 routing table"
+fi