[openal] ALC_SOFT_device_clock proposal

[Chris Robinson]

On 12/03/2017 04:38 PM, Chris Robinson wrote:
> This extension's been waiting for a while now, so I've added the last 
> two queries I was planning for it and wrote up and extension spec. 
> Feedback is welcome! Especially if you have experience with doing 
> accurate audio timing and synchronization with other timing sources, if 
> there's anything that seems to be missing or can be improved, please let 
> me know. You can play around with it and test it out in the latest Git.

Presuming there's no issues worth bringing up, then this can be 
considered complete and Git will soon be updated accordingly.