.pc files for input drivers

[Peter Hutterer]

On Tue, Sep 30, 2008 at 10:54:51AM -0700, Donnie Berkholz wrote:
> > Anyone opposed to a follow-up patch to install the <drivername>.pc file?
> > If not, xorg-<drivername>.pc or just<drivername>.pc?
> 
> If this is going in every driver, would it make sense as part of 
> xorg-macros?  Also I'm wondering whether the sdk dir should be detected from
> xorg-server instead of having a configure flag at all.

Amended patch below. Turns out the sdk detection was already there anyway, so
this patch is shorter than the previous one. 
And makes the need for macros unnecessary, since it's only one line in
configure.ac and all drivers that matter already get the sdkdir anyway.