Merge pull request #26621 from guillaumekoenig/install-gtk-launch

gtk3: install gtk-launch

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

@@ -65,6 +65,8 @@ stdenv.mkDerivation rec {
       --replace '-L${gmp.dev}/lib' '-L${gmp.out}/lib'
     # The updater is needed for nixos env and it's tiny.
     moveToOutput bin/gtk-update-icon-cache "$out"
+    # Launcher
+    moveToOutput bin/gtk-launch "$out"
   '';
 
   meta = with stdenv.lib; {