audit: tie ANOM_ABEND records to syscall

Since core dump events are triggered by user activity, tie the
ANOM_ABEND record to the syscall record to collect all records from the
same event.

See: https://github.com/linux-audit/audit-kernel/issues/88

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

kernel/auditsc.c

@@ -2461,7 +2461,7 @@ void audit_core_dumps(long signr)
 	if (signr == SIGQUIT)	/* don't care for those */
 		return;
 
-	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
+	ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_ANOM_ABEND);
 	if (unlikely(!ab))
 		return;
 	audit_log_task(ab);