WebAssembly target for Guix (Showcase)

[zamfofex]

Hello, Guix! I have recently worked on a WebAssembly target (for 
cross‐compilation) for Guix. It’s still in very early stages and thus fairly 
lacking, but it is enough to cross‐compile certain simple packages such as 
‘lolcat’.

Maybe people might find it useful and/or interesting in some way. I have shared 
it here: https://git.sr.ht/~zamfofex/guix-wasm

The WebAssembly changes are applied on top of https://issues.guix.gnu.org/63088 
(“Add Lc0”) because I had in my local Guix clone, and I didn’t bother to rebase.

I’d love to know what y’all might think about it!