tests: Update external tests (1.1.2-dev-393)

backend.native/tests/external/codegen/box/callableReference/property/simpleMutableTopLevel.kt

@@ -0,0 +1,12 @@
+data class Box(val value: String)
+
+var pr = Box("first")
+
+fun box(): String {
+    val property = ::pr
+    if (property.get() != Box("first")) return "Fail value: ${property.get()}"
+    if (property.name != "pr") return "Fail name: ${property.name}"
+    property.set(Box("second"))
+    if (property.get().value != "second") return "Fail value 2: ${property.get()}"
+    return "OK"
+}