sccache: add distributed features (dist-client, dist-server)

pkgs/by-name/sc/sccache/package.nix

···
   rustPlatform,
   pkg-config,
   openssl,
+  distributed ? false,
 }:
 
 rustPlatform.buildRustPackage rec {
···
   };
 
   cargoHash = "sha256-1kfKBN4uRbU5LjbC0cLgMqoGnOSEAdC0S7EzXlfaDPo=";
+
+  buildFeatures = lib.optionals distributed [
+    "dist-client"
+    "dist-server"
+  ];
 
   nativeBuildInputs = [
     pkg-config