b8acc73278
Inspired by Homebrew/homebrew-core#235513. It doesn't quite fix that issue, because `libomp` does not ship CMake config files, but this would probably still be useful for keg-only formulae that do ship CMake config files. While we're here, let's replace the `pkg-config` references with the now-canonical name `pkgconf`.
Library
This directory contains all the code run by the official brew command in Homebrew and all formulae (package descriptions) in taps (repositories containing formulae) in Taps subdirectories.