hwc: Add scalar tag to dynamic debug

Expand dynamic debug function to allow scalar logging.

Change-Id: Ib1fb19788902dbcc0179856e139d3e3146ae8e52
CRs-Fixed: 2063587
diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index 5e327d7..8985dd6 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2010 The Android Open Source Project
- * Copyright (C) 2012-2014, 2016 The Linux Foundation. All rights reserved.
+ * Copyright (C) 2012-2014, 2016-2017 The Linux Foundation. All rights reserved.
  *
  * Not a Contribution, Apache license notifications and license are
  * retained for attribution purposes only.
@@ -93,6 +93,7 @@
         DEBUG_DRIVER_CONFIG,
         DEBUG_ROTATOR,
         DEBUG_QDCM,
+        DEBUG_SCALAR,
     };
 
     enum {