Store build as artifact in appveyor
Store build as artifact in appveyor

7z is already available in path in appveyor
zip the build .exe files and store them ( appveyor retains for ~6 months)

(cherry picked from commit 7ae70625f38492072818e674e6db6ec8a21c6085)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot