JS: move more test to box tests

js/js.translator/testData/box/examples/newInstanceDefaultConstructor.kt

@@ -0,0 +1,11 @@
+class SimpleClass() {
+    fun foo() = 610
+}
+
+fun box(): String {
+    val c = SimpleClass()
+    if (c.foo() == 610) {
+        return "OK"
+    }
+    return "FAIL"
+}