JS: move more test to box tests

js/js.translator/testData/box/examples/enclosingLocalVariable.kt

@@ -0,0 +1,8 @@
+fun box(): String {
+    val cl = 39
+    return if (sum(200, { val m = { val r = { cl };  r() }; m() }) == 239) "OK" else "FAIL"
+}
+
+fun sum(arg: Int, f: () -> Int): Int {
+    return arg + f()
+}