kdeFrameworks: fixup inputs and outputs

- Reduce environment pollution with a separate $bin output containing programs,
  plugins, and shared data. Libraries remain in $out and are not installed into
  the environment.
- Only propagate build inputs as required.

pkgs/development/libraries/kde-frameworks/kauth/default.nix

@@ -1,12 +1,17 @@
 {
-  mkDerivation, lib, copyPathsToStore,
+  mkDerivation, lib, copyPathsToStore, propagate,
   extra-cmake-modules, kcoreaddons, polkit-qt, qttools
 }:
 
 mkDerivation {
   name = "kauth";
   meta = { maintainers = [ lib.maintainers.ttuegel ]; };
-  nativeBuildInputs = [ extra-cmake-modules qttools ];
-  propagatedBuildInputs = [ kcoreaddons polkit-qt ];
+  nativeBuildInputs = [ extra-cmake-modules ];
+  buildInputs = [ polkit-qt qttools ];
+  propagatedBuildInputs = [ kcoreaddons ];
   patches = copyPathsToStore (lib.readPathsFromFile ./. ./series);
+  # library stores reference to plugin path,
+  # separating $out from $bin would create a reference cycle
+  outputs = [ "out" "dev" ];
+  setupHook = propagate "out";
 }