kdenlive: move to subdirectory with patches

pkgs/applications/kde/default.nix

···
       kdegraphics-mobipocket = callPackage ./kdegraphics-mobipocket.nix {};
       kdegraphics-thumbnailers = callPackage ./kdegraphics-thumbnailers.nix {};
       kdenetwork-filesharing = callPackage ./kdenetwork-filesharing.nix {};
-      kdenlive = callPackage ./kdenlive.nix {};
+      kdenlive = callPackage ./kdenlive {};
       kdepim-runtime = callPackage ./kdepim-runtime {};
       kdepim-addons = callPackage ./kdepim-addons.nix {};
       kdepim-apps-libs = callPackage ./kdepim-apps-libs {};