init for imported module is called before the init of it's imports

`super.nim`
```nim
import std/syncio
import sub
echo "super"
```

`sub.nim`
```nim
import std/syncio
import b, a
echo "sub"
```

`b.nim`
```nim
import std/syncio
echo "b"
```

`a.nim`
```nim
import std/syncio
echo "a"
```

will print
```
sub
b
a
super
```

should be `b`, `a`, `sub`, `super` instead.

order of init execution seems to be dependent on order of linking .o files.