New review comment by ailiop-git on void-packages repository

https://github.com/void-linux/void-packages/pull/29853#discussion_r603364018

Comment:
> Why does it need `autoconf` and `automake`, given that it's using the `gnu-configure` build style, so at least `configure` has already been generated?

Because the makefile under src/external_libs calls autogen.sh for libcdada among other things, and generally expects to generate everything for libcdada. Indeed this shouldn't be necessary as `configure` is already generated for it, but I didn't want to mess with the makefile right now, this needs to be properly fixed in the upstream project.