Use TASK_THREAD_TIMES_INFO_COUNT when calling task_info with TASK_THREAD_TIMES_INFO

This hasn't caused any problems yet but we are passing a pointer to struct
task_thread_times_info which can cause problems if we populate over the
existing size of the struct.
Message-Id: <ZGRDDNcOM2hA3CuT@jupiter.tail36e24.ts.net>