[PATCH:intel-gpu-tools v2] Make testdisplay build optional and disable on systems without requirements

[Gaetan Nadon]

On 12-01-23 11:25 PM, Alan Coopersmith wrote:
> Allows building on non-Linux systems which don't have libudev to query
> the Linux kernel specific udev interfaces.
>
> Fails configure if --enable-testdisplay is passed and a dependency is missing.
>
> Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>
> ---
Thanks for fixing my typos.

Reviewed-by:  Gaetan Nadon <memsize at videotron.ca>