JS: move more test to box tests

js/js.translator/testData/box/propertyOverride/overloadPrivateVal.kt

@@ -0,0 +1,28 @@
+package foo
+
+open class A {
+    private val a = 1
+
+    private val b = 2
+        get() {
+            return field + 10 + 100 * a
+        }
+    fun getBInA(): Int {
+        return b
+    }
+}
+
+class B : A() {
+    val a = 13
+    val b = 42
+}
+
+
+fun box(): String {
+    val b = B()
+    if (b.getBInA() != 112) return "b.getBInA() != 112, it: ${b.getBInA()}"
+
+    if (b.a != 13) return "b.a != 13, it: ${b.a}"
+    if (b.b != 42) return "b.b != 42, it: ${b.b}"
+    return "OK"
+}