M1 Max + GNU coreutils: "Your arch is announced as x86_64, but it seems to actually be ARM64"

[Birch-san]

When I build, the makefile detects my M1 Max as 86_64.

This is because I have GNU coreutils uname on my PATH, which announces my architecture as arm64 (whereas the system distribution of uname would call the same architecture arm).

https://github.com/Lightning-AI/lightning/pull/13992#issuecomment-1204157830
https://github.com/Lightning-AI/lightning/issues/13991

this condition needs widening to accept both arm and arm64:

https://github.com/ggerganov/llama.cpp/blob/c09a9cfb06c87d114615c105adda91b0e6273b69/Makefile