gtk3: add missing libXdamage

This is an optional dependency, however this is needed for XEmbed
tray icons on MATE to work properly. This is already enabled in gtk4.

https://gitlab.gnome.org/search?search=xdamage&project_id=665&group_id=8&search_code=true&repository_ref=gtk-3-24

pkgs/development/libraries/gtk/3.x.nix

@@ -145,6 +145,7 @@ stdenv.mkDerivation rec {
     libSM
     libXcomposite
     libXcursor
+    libXdamage
     libXi
     libXrandr
     libXrender