[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/etc/selinux/mls/contexts/userhelper_context b/rootfs/etc/selinux/mls/contexts/userhelper_context
new file mode 100644
index 0000000..dc37a69
--- /dev/null
+++ b/rootfs/etc/selinux/mls/contexts/userhelper_context
@@ -0,0 +1 @@
+system_u:sysadm_r:sysadm_t:s0