Add an implementation of cpu_info() for OpenBSD, that returns a
correctly-sized array. Since Rust's libc bindings for OpenBSD do not
contain all symbols necessary for a full implementation and it is not
planned to add them, this solution at least avoids problems with code
that relies on cpu_info() purely for the size of the returned array to
derive the number of available CPUs.
This addresses https://github.com/denoland/deno/issues/25621
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---------
Signed-off-by: Matt Mastracci <matthew@mastracci.com>
Co-authored-by: Matt Mastracci <matthew@mastracci.com>
