Until a recent patch in coreutils, gnus uname -p returned a different
arch on apple silicon macs, compared to the uname shipped with macos.
This causes config.guess to produce incorrect build system triplets
for various projects on these systems when in a nix-shell.[23][42]
As coreutils only releases every few months/years and no release is
planned at the moment, I'm introducing the patch here. We can drop it
once the next coreutils version is released.
I made a tiny adjustment to the patch from [23]. I removed the usage
of MAYBE_UNUSED, which currently only compiles against HEAD.
[23] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=52330
[42] https://github.com/NixOS/nixpkgs/issues/147914
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