Use 64 bits counters to mitigate wrapping

Change-Id: I5c1f6a936fcd0d5d38c95a9fe6344fd7bf440e91
diff --git a/tools/test/p4src/p4-14/p4c-out/tofino/default/montara/logs/pa.characterize.log b/tools/test/p4src/p4-14/p4c-out/tofino/default/montara/logs/pa.characterize.log
index 6ad45f2..5b1b0ac 100644
--- a/tools/test/p4src/p4-14/p4c-out/tofino/default/montara/logs/pa.characterize.log
+++ b/tools/test/p4src/p4-14/p4c-out/tofino/default/montara/logs/pa.characterize.log
@@ -1,7 +1,7 @@
 +---------------------------------------------------------------------+
 |  Log file: pa.characterize.log                                      |
 |  Compiler version: 5.1.0 (fca32d1)                                  |
-|  Created on: Wed Sep 13 01:39:58 2017                               |
+|  Created on: Wed Sep 13 12:56:57 2017                               |
 +---------------------------------------------------------------------+
 
 Program: default