Fix Tru64 UNIX bootstrap: use lbasename in toplev.c (output_stack_usage)

[Eric Botcazou]

> 2010-09-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
>
> 	* toplev.c (output_stack_usage): Use lbasename instead of
> 	basename.

Thanks for fixing this!

-- 
Eric Botcazou