test/timer_perf: fix memory leak

Fixes: 277afaf3db ("app/test: add timer_perf")
Cc: stable@dpdk.org

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>

test/test/test_timer_perf.c

@@ -127,6 +127,7 @@ test_timer_perf(void)
 	printf("Time per rte_timer_manage with zero callbacks: %"PRIu64" cycles\n",
 			(end_tsc - start_tsc + iterations/2) / iterations);
 
+	rte_free(tms);
 	return 0;
 }