Consider wrapping beta extensions

[VarLad]

As of #311 , I can see that some extensions are missing. That doesn't make sense as wrap.jl does include cl_ext.h and the extensions are still present in https://github.com/JuliaGPU/OpenCL.jl/blob/master/res/wrap.jl

This shouldn't be a showstopper for the PR itself, but in the future I was planning to use the cl_khr_command_buffer extension to provide similar optimizations to OpenCL.jl as the ones provided by oneAPI's command_list API.

We need to look into why the script is not wrapping some extensions.

[VarLad]

@maleadt can you run the script at some point to see if you get similar issues or is it just me 🤔

[maleadt]

That's KhronosGroup/OpenCL-Headers#268: https://github.com/KhronosGroup/OpenCL-Headers/blob/b79b358ff6b9998d3fc65a5f55083db3d651d55d/CL/cl_ext.h#L50-L54