Add check for alternate `uname -m` output for arm arch

Some machines will output aarch64 instead of arm64, this pr adds support for both.

After:

Running the build script (fails on missing python dir here, never figured this out though)
Copying files into ~/.cache/solana/v1.x/platform-tools
Symlinking to $sbf_sdk_dir/dependencies

I am able to successfully run cargo build with aarch64-unknown-linux-gnu

root@822384e32597:/tmp/decoy-crate# cargo build-sbf
    Finished release [optimized] target(s) in 1.32s
root@822384e32597:/tmp/decoy-crate# cargo build-bpf
    Finished release [optimized] target(s) in 1.30s
root@822384e32597:/tmp/decoy-crate# uname -m
aarch64

The build time for this was very long on my machine so it would be amazing to have this in releases (current issue https://github.com/solana-labs/platform-tools/issues/66)

anza-xyz / platform-tools

Add check for alternate `uname -m` output for arm arch #71