New comment by Piraty on void-packages repository

https://github.com/void-linux/void-packages/pull/25004#issuecomment-702834965

Comment:
upstream refuses to support cross-building their "stage1 zig" (see: https://github.com/ziglang/zig/pull/4494#issuecomment-587172905).

I propose to add the complete list of supported architectures to`archs=` and let everyone in need of zig on a non x86 platform build it manualy (I guess < 5 users).

[EDIT] On the other hand, if this PR is ready anyway, who not :1st_place_medal: 
[EDIT2] I did not see that upstream contributed to the related issue https://github.com/void-linux/void-packages/issues/24959#issuecomment-695100315 which seems upstream is now open to cross-building stage1?