kldap: add libsecret to buildInputs

pkgs/applications/kde/kldap.nix

···
 {
   mkDerivation, lib, kdepimTeam,
   extra-cmake-modules, kdoctools,
-  cyrus_sasl, ki18n, kio, kmbox, openldap, qtkeychain
+  cyrus_sasl, ki18n, kio, kmbox, libsecret, openldap, qtkeychain
 }:
 
 mkDerivation {
···
     maintainers = kdepimTeam;
   };
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
-  buildInputs = [ ki18n kio kmbox qtkeychain ];
+  buildInputs = [ ki18n kio kmbox libsecret qtkeychain ];
   propagatedBuildInputs = [ cyrus_sasl openldap ];
   outputs = [ "out" "dev" ];
 }