JS/RTTI: fix cast to Any

js/js.translator/testData/expression/cast/cases/castToAny.kt

@@ -0,0 +1,12 @@
+package foo
+
+fun box(): String {
+    val x = 0
+    val y = 1
+    val z = 2
+    val xs = arrayListOf(z, y, x)
+    xs.remove(x as Any)
+    assertEquals(listOf(z, y), xs)
+
+    return "OK"
+}

js/js.translator/testData/kotlin_lib_ecma5.js

@@ -555,6 +555,12 @@ var Kotlin = {};
         }
     };
 
+    Kotlin.isAny = function () {
+        return function (object) {
+            return object != null;
+        }
+    };
+
     Kotlin.kotlinModuleMetadata = function (abiVersion, moduleName, data) {
     };