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

backend.native/tests/external/codegen/box/closures/kt4137.kt

@@ -0,0 +1,13 @@
+open class A(val s: Int) {
+
+}
+
+infix fun Int.foo(s: Int): Int {
+    return this + s
+}
+
+open class B : A({ 1 foo 2} ())
+
+fun box(): String {
+    return if (B().s == 3) "OK" else "Fail"
+}