Add selinux policies for superuser

Change-Id: I878eaa9d25feaedf46e89083f91d6a21f4aff37a
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index ee47c75..dc770f2 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -14,3 +14,8 @@
 
 /data/hostapd(/.*)?         u:object_r:wifi_data_file:s0
 /data/misc/radio(/.*)?      u:object_r:radio_data_file:s0
+
+#############
+# Superuser's control sockets
+/dev/com.android.settings.daemon(/.*)?   u:object_r:superuser_device:s0
+/dev/com.android.settings(/.*)?   u:object_r:superuser_device:s0