[hxcpp] stepping over shouldn't just fall through

Consider this example code:

```haxe
class Main {
static function main() {
foo();
}

static function foo() {
var value = 1;
trace("bar");
}
}
```

Stepping over at the end of the function suddenly puts me into `EntryPoint.hx`, which can be somewhat confusing:


The behavior with all other debuggers (Eval, HL, Flash and JS) is instead:

- stepping over first gives some indication that we're about to leave the function, see #7767 for more details
- stepping over again puts you at `foo()` in `main()`, or `}` in `main()` in Eval's case