Warn when downloading x86_64 build on arm64 machine

[pzmarzly]

lix supports arm64 machines (e.g. Raspberry Pi, M1 Macs running VMs or Asahi Linux) since 5ba8ac5, but you need to run lix install haxe nightly first. Without it you get very confusing errors. It would be nice if lix refused to download non-compatible releases or at least complained very loudly about it.

pzmarzly@lima-default:~/tink_web$ uname -a
Linux lima-default 5.15.0-43-generic #46-Ubuntu SMP Wed Jul 13 06:42:04 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux

pzmarzly@lima-default:~/tink_web$ file /home/pzmarzly.linux/haxe/versions/4.2.0/haxelib
/home/pzmarzly.linux/haxe/versions/4.2.0/haxelib: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=dfe0110198f11b56ddff62d8224e54c2024aa4e6, with debug_info, not stripped

pzmarzly@lima-default:~/tink_web$ /home/pzmarzly.linux/haxe/versions/4.2.0/haxelib
bash: /home/pzmarzly.linux/haxe/versions/4.2.0/haxelib: cannot execute binary file: Exec format error

Though the nicest solution would be to get stable arm64 releases 😄