JS backend: added tests which pass an extension lambda to native code and visa versa.

Added workarounds in some tests because Rhino wrongly implicitly converts first parameter of `Function.call` to `Object`. But it's contradicts to ES5 specification(par. 15.3.4.4).

(#KT-4238, #KT-4345) In progress

js/js.translator/testData/native/cases/passExtLambdaFromNative.kt

@@ -0,0 +1,18 @@
+package foo
+
+native
+class A(val v: String)
+
+class B {
+    fun bar(a: A, extLambda: A.(Int, String) -> String): String = a.extLambda(7, "_rr_")
+}
+
+native
+fun nativeBox(b: B): String = noImpl
+
+fun box(): String {
+    val r = nativeBox(B())
+    if (r != "foo_rr_7") return r
+
+    return "OK"
+}