configure: Break single-line ac_config_files list into multiple lines.

[Marcus Meissner]

On Sat, Feb 24, 2007 at 02:15:29PM +0200, Saulius Krasuckas wrote:
> This long line breaks automated rebasing of one of testing branches on 
> (namely ntoskrnl) on my box every time a new dll or program is added.  
> That's because I need to merge conflict for this line by my hand.
> 
> And I am not sure what stops us from keeping "ac_config_files" list 
> multiline, so merging in future could be automatical.

The problem is that configure is automatically generated from
configure.ac.

Ciao, Marcus