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/desktops/plasma-5/bluedevil.nix

@@ -7,11 +7,10 @@
 mkDerivation {
   name = "bluedevil";
   nativeBuildInputs = [ extra-cmake-modules shared_mime_info ];
-  propagatedBuildInputs = [
+  buildInputs = [
     bluez-qt ki18n kio kwindowsystem plasma-framework qtdeclarative kcoreaddons
     kdbusaddons kded kiconthemes knotifications kwidgetsaddons
   ];
-  propagatedUserEnvPkgs = [ bluez-qt.out ];
   postInstall = ''
     # Fix the location of logic.js for the plasmoid
     ln -s $out/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/code/logic.js $out/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/logic.js