Update perfprofd rules to allow wake_unlock inspection.

Bug: http://b/19483574
Change-Id: Ie620011cb1d2c05fdfd4f2da375a57e47140b98f

perfprofd.te

@@ -30,6 +30,9 @@ userdebug_or_eng(`
   read_logd(perfprofd);
   write_logd(perfprofd);
 
+  # perfprofd inspects /sys/power/wake_unlock
+  wakelock_use(perfprofd);
+
   # simpleperf uses ioctl() to turn on kernel perf events measurements
   allow perfprofd self:capability sys_admin;