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/kcoreaddons.nix

@@ -1,4 +1,8 @@
-{ mkDerivation, lib, fetchurl, extra-cmake-modules, qtbase, qttools, shared_mime_info }:
+{
+  mkDerivation, lib, fetchurl, writeScript,
+  extra-cmake-modules,
+  qtbase, qttools, shared_mime_info
+}:
 
 mkDerivation {
   name = "kcoreaddons";
@@ -6,6 +10,7 @@ mkDerivation {
     maintainers = [ lib.maintainers.ttuegel ];
     broken = builtins.compareVersions qtbase.version "5.6.0" < 0;
   };
-  nativeBuildInputs = [ extra-cmake-modules qttools ];
-  propagatedBuildInputs = [ qtbase shared_mime_info ];
+  nativeBuildInputs = [ extra-cmake-modules ];
+  buildInputs = [ qttools shared_mime_info ];
+  propagatedBuildInputs = [ qtbase ];
 }