Bridge descriptor's visibility is equal to the visibility of its owner.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt

@@ -102,7 +102,7 @@ internal class SpecialDescriptorsFactory(val context: Context) {
                 },
                 returnType,
                 descriptor.modality,
-                Visibilities.PUBLIC)
+                descriptor.visibility)
     }
 }