JS: move expressions test to box tests

js/js.translator/testData/box/expression/misc/localVarAsFunction.kt

@@ -0,0 +1,18 @@
+package foo
+
+var c = 2
+
+fun loop(times: Int) {
+    var left = times
+    while (left > 0) {
+        val u: (value: Int) -> Unit = {
+            c++
+        }
+        u(left--)
+    }
+}
+
+fun box(): Any? {
+    loop(5)
+    return if (c == 7) return "OK" else c
+}