libjxl: Move brotli and libhwy to propagatedBuildInputs
libjxl: Move brotli and libhwy to propagatedBuildInputs

pkg-config dependencies aren't specified using store paths so
they need to be propagated manually

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs