JS backend: tests for reflection support

js/js.translator/testData/callableReference/function/cases/classMemberOverriddenInObject.kt

@@ -0,0 +1,15 @@
+package foo
+
+open class A {
+    open fun foo(a:String,b:String): String = "fooA:" + a + b
+}
+
+object B : A() {
+    override fun foo(a:String,b:String): String = "fooB:" + a + b
+}
+
+fun box(): String {
+    var ref = B::foo
+    val result = B.(ref)("1", "2")
+    return (if (result == "fooB:12") "OK" else result)
+}