New review comment by JohnGebbie on void-packages repository

https://github.com/void-linux/void-packages/pull/39716#discussion_r1059662884

Comment:
numen is not just a go executable, it's a pipline with shell scripts too.
The go module name has to be `git.sr.ht/~geb/numen` but the go file is speech.go.
I have added `go_package="speech.go"` so it is compiled as `speech` which is a slight improvement I think.

(I also thought I could compile it to $wrksrc by with `do_install` instead of `post_install` but then it ends up in a directory in $GOPATH.)