Kotlin native with SFML example

This is an example showing kotlin native with SFML (Linux version).

More info on Kotlin native

More info on SFML

Use interop.sh to create the cinterop files.

User build.sh to build the executable.

Note: this needs a recent version of kotlin-native. I used this version https://github.com/JetBrains/kotlin-native/tree/78c043f15ff51660068f7f97da807e1d5ab2742b.