Support for ARM + musl

[jacobdr]

The official project builds builds for ARM (to be honest I'm not sure what the node-v19.0.0-linux-armv7 and node-v19.0.0-linux-arm64 is), and this project builds for musl on x86_64.

It would be great if this project could start to build musl for arm, in the hopes that eventually we could stabilize this and maybe promote to the official build system.

Use case is downloading static binaries onto an Alpine distro running on ARM hardware outside of the alpine packaging machinery (since those versions are much more restricted than what is built here)

[jacobdr]

Herm I guess this is a duplicate of #50 (with its associated PR #59)...