treewide: Update meta of packages hosted on gnome

- Update homepage URLs
- Add missing meta entries

pkgs/development/libraries/goocanvas/default.nix

@@ -15,13 +15,14 @@ stdenv.mkDerivation rec {
   passthru = {
     updateScript = gnome3.updateScript {
       packageName = pname;
+      versionPolicy = "none";
     };
   };
 
-  meta = { 
+  meta = with stdenv.lib; {
     description = "Canvas widget for GTK+ based on the the Cairo 2D library";
-    homepage = http://goocanvas.sourceforge.net/;
-    license = ["GPL" "LGPL"];
+    homepage = "https://wiki.gnome.org/Projects/GooCanvas";
+    license = licenses.lgpl2;
     platforms = stdenv.lib.platforms.unix;
   };
 }