New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/27082#discussion_r544627803

Comment:
Have you tried dropping the `libqhull` target and removing `${FILESDIR}/qhull.pc` to see if the dependants will link against the non-deprecated `libqhull_r`? If everything we ship links against the new library, we should drop the deprecated, non-default targets.