ostest:Ignore runtime error.

wdog.c:190:3: runtime error: signed integer overflow: 9223372036854775807 + 1 cannot be represented in type 'long int'
    #0 0x40e35d3a in wdog_test_run /home/cuiziwei/ska/vela/vela-dev2/apps/testing/ostest/wdog.c:190
    #1 0x40e35e75 in wdog_test_thread /home/cuiziwei/ska/vela/vela-dev2/apps/testing/ostest/wdog.c:207
    apache#2 0x40773ffa in pthread_startup pthread/pthread_create.c:59
    apache#3 0x4495e037 in pthread_start pthread/pthread_create.c:139
    apache#4 0x40301864 in pre_start sim/sim_initialstate.c:52

Signed-off-by: cuiziwei <cuiziwei@xiaomi.com>

testing/ostest/wdog.c

@@ -187,7 +187,8 @@ static void wdog_test_run(FAR wdtest_param_t *param)
 
   /* Delay wraparound (delay < 0) */
 
-  wdtest_assert(wd_start(&test_wdog, delay + 1,
+  delay = (sclock_t)((clock_t)delay + 1);
+  wdtest_assert(wd_start(&test_wdog, delay,
                 wdtest_callback, (wdparm_t)param) != OK);
   wdtest_assert(wd_gettime(&test_wdog) == 0);