When exiting a thread, submit any pending record. Today, we don't

audit thread exit, but should that happen, this will prevent
unhappiness, as the thread exit system call will never return, and
hence not commit the record.

Pointed out by/with:	cognet
Obtained from:		TrustedBSD Project

sys/kern/kern_thread.c

@@ -471,6 +471,10 @@ thread_exit(void)
 	    (long)p->p_pid, p->p_comm);
 	KASSERT(TAILQ_EMPTY(&td->td_sigqueue.sq_list), ("signal pending"));
 
+#ifdef AUDIT
+	AUDIT_SYSCALL_EXIT(0, td);
+#endif
+
 	if (td->td_standin != NULL) {
 		/*
 		 * Note that we don't need to free the cred here as it