selinux: label mac address in sysfs

Bug: 18068520
Bug: 21852542
Change-Id: I7c80f545927f1c9ff43f852dedb4a500187ef070
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index bfbfbf5..04531a6 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -163,5 +163,8 @@
 /sys/devices/cycapsense_prog.1/cycapsense_fw             u:object_r:sysfs_capsense_update:s0
 /sys/devices/mmi_sar_ctrl.[0-9]*/sar_wifi                u:object_r:sysfs_sar_wifi:s0
 
+# wifi mac address
+/sys/devices/virtual/net/wlan0/address                   u:object_r:sysfs_mac_address:s0
+
 /system/bin/imsdatadaemon                       u:object_r:ims_exec:s0
 /system/bin/imsqmidaemon                        u:object_r:ims_exec:s0