JS backend: fixed crash when use lambda or local function inside enum method.

js/js.translator/testData/expression/function/cases/lambdaOrLocalFunInsideEnumMethod.kt

@@ -0,0 +1,21 @@
+package foo
+
+enum class Foo {
+    BAR
+
+    fun test(): () -> String {
+        fun local() = 29
+        val lambda = { "OK" + local() }
+
+        assertEquals(29, local())
+        assertEquals("OK29", lambda())
+
+        return lambda
+    }
+}
+
+fun box(): String {
+    assertEquals("OK29", Foo.BAR.test()())
+
+    return "OK"
+}