[Bug libgomp/82428] Builtins for openacc gang/worker/vector id/size

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82428

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #2)
> Created attachment 43000 [details]
> Updated tentative patch
> 
> Updated tentative patch, tested with nvptx accelerator.

Bootstrap and reg-test on x86_64 also went ok.