[libstdc++] Cleanup build system 9/n

[Benjamin Kosnik]

> 2005-04-07  Kelley Cook  <kcook@gcc.gnu.org>
> 
> 	* configure.ac: Create template for PACKAGE and VERSION.
> 	Update comment on how to regenerate file.
> 	* acconfig.h: Remove PACKAGE and VERSION.
> 	* config.h.in, configure: Regenerate.

Thanks this looks great.

-benjamin