fltk: upgrade devel, use cmake

This PR is broken.  CMake builds fltk, but it fails to compile into octave.  When built with configure, it builds into octave just fine.


- Upgrade devel to 1.3.x-r9705
- Apply the existing patch only to stable.
- Adjust the patch to apply without fuzz or offsets.
- Add deps on fontconfig and freetype that it will find in X11 otherwise
- Add a dep on CMake.
- Build with CMake not `configure`.
- CMake building gets us valuable `.cmake` files.
- Add an option to build the examples which work well.
- Works with superenv, without-x.