Use 64 bits counters to mitigate wrapping

Change-Id: I5c1f6a936fcd0d5d38c95a9fe6344fd7bf440e91
diff --git a/tools/test/p4src/p4-14/p4c-out/tofino/ecmp/montara/logs/pa.constraints.log b/tools/test/p4src/p4-14/p4c-out/tofino/ecmp/montara/logs/pa.constraints.log
index d7a5066..88781a0 100644
--- a/tools/test/p4src/p4-14/p4c-out/tofino/ecmp/montara/logs/pa.constraints.log
+++ b/tools/test/p4src/p4-14/p4c-out/tofino/ecmp/montara/logs/pa.constraints.log
@@ -1,7 +1,7 @@
 +---------------------------------------------------------------------+
 |  Log file: pa.constraints.log                                       |
 |  Compiler version: 5.1.0 (fca32d1)                                  |
-|  Created on: Wed Sep 13 01:41:28 2017                               |
+|  Created on: Wed Sep 13 12:58:27 2017                               |
 +---------------------------------------------------------------------+
 
 To populate this log file, include --print-pa-constraints as a compiler argument.