New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/34039#discussion_r1070590183

Comment:
> You did it, making a complex template, downloading a lot of software "manually", which makes maintenance more complicated, it is not easy to compile versions after 1.2.1, several distros would not yet have version 1.2.1 in their repositories, due to the problem with find SDL2 on various cpus architectures.

If CMake is fetching submodules at build time, that is unacceptable. Void templates should explicitly fetch all components of a build so that we can verify that the contents are as expected and the process is as reproducible as possible.