nitg/ffi: intro of FFI with C++

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
nitg/ffi: adds support for the cpp_compiler_options

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
tests: intro tests for FFI with C++

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib/sdl: intro a feature to get the X11 window handle

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
lib: intro the opengles2, egl and x11 modules and one test

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>