sdbus/sdbus-networkmanager: add missing metadata

https://github.com/NixOS/nixpkgs/pull/403654 was accepted for
KlipperScreen, but I neglected to add metadata to its Python
dependencies.

pkgs/development/python-modules/sdbus-networkmanager/default.nix

@@ -1,4 +1,5 @@
 {
+  lib,
   buildPythonPackage,
   fetchPypi,
   sdbus,
@@ -17,4 +18,12 @@ buildPythonPackage {
     inherit pname version;
     hash = "sha256-NXKsOoGJxoPsBBassUh2F3Oo8Iga09eLbW9oZO/5xQs=";
   };
+
+  meta = with lib; {
+    description = "python-sdbus binds for NetworkManager";
+    homepage = "https://github.com/python-sdbus/python-sdbus-networkmanager";
+    license = licenses.lgpl2;
+    maintainers = with maintainers; [ camelpunch ];
+    platforms = platforms.linux;
+  };
 }

pkgs/development/python-modules/sdbus/default.nix

@@ -1,5 +1,6 @@
 {
   pkgs,
+  lib,
   buildPythonPackage,
   fetchPypi,
   pkg-config,
@@ -19,4 +20,12 @@ buildPythonPackage {
     inherit pname version;
     hash = "sha256-QdYbdswFqepB0Q1woR6fmobtlfQPcTYwxeGDQODkx28=";
   };
+
+  meta = with lib; {
+    description = "Modern Python library for D-Bus";
+    homepage = "https://github.com/python-sdbus/python-sdbus";
+    license = licenses.lgpl2;
+    maintainers = with maintainers; [ camelpunch ];
+    platforms = platforms.linux;
+  };
 }