Stop breaking build by defining sysfs_devices_system_cpu.

Change-Id: Ie96d573be971b2dcc3d60614794ba9ca13b31471

file.te

@@ -81,6 +81,8 @@ type security_file, file_type;
 type bluetooth_efs_file, file_type;
 # Downloaded files
 type download_file, file_type;
+# /sys/devices/system/cpu
+type sysfs_devices_system_cpu, file_type;
 
 # Socket types
 type adbd_socket, file_type;