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/bluez-qt.nix

@@ -10,9 +10,10 @@ mkDerivation {
     broken = builtins.compareVersions qtbase.version "5.6.0" < 0;
   };
   nativeBuildInputs = [ extra-cmake-modules ];
-  propagatedBuildInputs = [ qtdeclarative ];
+  buildInputs = [ qtdeclarative ];
+  propagatedBuildInputs = [ qtbase ];
   preConfigure = ''
     substituteInPlace CMakeLists.txt \
-      --replace /lib/udev/rules.d "$out/lib/udev/rules.d"
+      --replace /lib/udev/rules.d "$bin/lib/udev/rules.d"
   '';
 }