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/kfilemetadata/default.nix

@@ -7,9 +7,10 @@
 mkDerivation {
   name = "kfilemetadata";
   meta = { maintainers = [ lib.maintainers.ttuegel ]; };
-  patches = copyPathsToStore (lib.readPathsFromFile ./. ./series);
   nativeBuildInputs = [ extra-cmake-modules ];
-  propagatedBuildInputs = [
-    attr ebook_tools exiv2 ffmpeg karchive ki18n poppler qtbase taglib
+  buildInputs = [
+    attr ebook_tools exiv2 ffmpeg karchive ki18n poppler taglib
   ];
+  propagatedBuildInputs = [ qtbase ];
+  patches = copyPathsToStore (lib.readPathsFromFile ./. ./series);
 }