Packaged DeforaOS libDesktop 0.0.10

This is as already found in pkgsrc x11/deforaos-libdesktop, but with patches
updated to keep building with Gtk+ 3 by default.
Mark the API change in libDesktop 0.0.10
Added a couple patches to DeforaOS Keyboard 0.2.1 to:
- fix building with libDesktop 0.0.10 (API change)
- force the tools to build with Gtk+ 3
Add condition of Error message.