Don't compile packet dumping code by default.

Bug: 7664960

Change-Id: Ieb56bcc010d0e12264d43e0a0dfcb1beb479d4e2
diff --git a/debug.h b/debug.h
index ba4971b..8e09672 100644
--- a/debug.h
+++ b/debug.h
@@ -18,7 +18,7 @@
 #ifndef __DEBUG_H__
 #define __DEBUG_H__
 
-// set to 1 to enable debug logging
+// set to 1 to enable debug logging and packet dumping.
 #define CLAT_DEBUG 0
 
 #endif /* __DEBUG_H__ */