kmailtransport: add qtkeychain to buildInputs

pkgs/applications/kde/kmailtransport.nix

···
   extra-cmake-modules, kdoctools,
   akonadi, akonadi-mime, cyrus_sasl, kcmutils,
   ki18n, kio, kmime, kwallet, ksmtp, libkgapi,
-  kcalendarcore, kcontacts
+  kcalendarcore, kcontacts, qtkeychain, libsecret
 }:
 
 mkDerivation {
···
     maintainers = kdepimTeam;
   };
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
-  buildInputs = [ akonadi kcmutils ki18n kio ksmtp libkgapi kcalendarcore kcontacts ];
+  buildInputs = [
+    akonadi kcmutils ki18n kio ksmtp libkgapi kcalendarcore kcontacts
+    qtkeychain libsecret
+  ];
   propagatedBuildInputs = [ akonadi-mime cyrus_sasl kmime kwallet ];
   outputs = [ "out" "dev" ];
 }