Functions have unique names now unless they are foreign, probably will

need a keyword to not mangle the names.

examples/order_independent_declarations.kl

@@ -37,6 +37,7 @@ main :: (): int
   asset1 := make_sound()
   asset2 := make_sound()
   asset1.next_asset = &asset2
+  return 0
 
   // @todo: This does not work
   // asset := []Asset{make_sound(), make_sound()}