New review comment by MeganerdNL on void-packages repository

https://github.com/void-linux/void-packages/pull/45381#discussion_r1281821076

Comment:
> why is this needed?

XBPS_TARGET_NO_ATOMIC8 line is quite common for packages using libatomic.
The $XBPS_TARGET_MACHINE line is because it won't compile  (or cross-compile at least) on musl otherwise. 
Complains of missing dependencies that are not there on glibc.