tc: report time an action was first used

Have print_tm() dump firstuse value along with install, lastuse
and expires.

v2: Resubmit after 'master' merged into next

Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
diff --git a/tc/tc_util.c b/tc/tc_util.c
index fd5fcb2..b7ff911 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -758,6 +758,10 @@
 		print_uint(PRINT_ANY, "last_used", " used %u sec",
 			   tm->lastuse / hz);
 
+	if (tm->firstuse != 0)
+		print_uint(PRINT_ANY, "first_used", " firstused %u sec",
+			   tm->firstuse / hz);
+
 	if (tm->expires != 0)
 		print_uint(PRINT_ANY, "expires", " expires %u sec",
 			   tm->expires / hz);