[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/usr/lib/opkg/alternatives/vigr b/rootfs/usr/lib/opkg/alternatives/vigr
new file mode 100644
index 0000000..c806170
--- /dev/null
+++ b/rootfs/usr/lib/opkg/alternatives/vigr
@@ -0,0 +1,2 @@
+/sbin/vigr
+/sbin/vigr.shadow 20