The currently available D3D12 API headers have incorrect C function
prototypes for these functions when compiling for non-Windows platforms.
Future changes here will move these helpers into the DirectX-Headers
project, but:
* The process of getting a fix into the headers is still ongoing
* I'd prefer to avoid taking an immediate dependency on just-published
headers again
So, for now add some helpers to work around this problem in Dozen
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Bill Kristiansen <billkris@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17340>
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