* [sdl2-gfx] Update CMake build and find_package support
* Update build process to more closely mimic other SDL2 extensions
* Bump CONTROL version number
* Remove uneeded wrapper file
* Remove uneeded wrapper file
* [sdl2-gfx] Simplification. Add cmake find_dependency(SDL2).
Co-authored-by: Robert Schumacher <roschuma@microsoft.com>