[PATCH v2] darwin: Fix non-Metal build

[Huw Davies]

On Sun, Dec 12, 2021 at 02:31:58AM -0500, Keno Fischer wrote:
> The build was relying on QuartzCore definitions even if
> Metal was not found, so move the appropriate import out
> of the ifdef and add the QuartzCore framework to the
> make line.
> 
> Signed-off-by: Keno Fischer <keno at juliacomputing.com>
> ---
> 
> v2: Drop `-framework QuartzCore` from configure.ac as
>     suggested by Dean Greer <gcenx83 at gmail.com>.

I've sent in v3 of this as I didn't want it to get lost.

The window painting issue discussed later in the thread is ongoing.

Huw.