New review comment by Duncaen on void-packages repository

https://github.com/void-linux/void-packages/pull/48625#discussion_r1485210188

Comment:
`libclang17` and `libclang-cpp17` both need the headers and don't depend on each other. `clang17` depends on `libclang-cpp17`.

Having the headers in a separate package is pretty standard, [alpine does the same](https://pkgs.alpinelinux.org/package/edge/main/x86_64/clang17-headers), [debian is similar, just a different name: libclang-common](https://packages.debian.org/sid/all/libclang-common-17-dev/filelist), only [fedora just has a single `clang-libs` package](https://packages.fedoraproject.org/pkgs/clang/clang-libs/fedora-rawhide.html) containing both libraries (libclang and libclang-cpp) and the headers.