JS: move expressions test to box tests

js/js.translator/testData/box/expression/function/namedArguments.kt

@@ -0,0 +1,16 @@
+package foo
+
+fun test(x: Int, y: Int) = y - x
+
+fun box(): String {
+    if (test(1, 2) != 1) {
+        return "fail1"
+    }
+    if (test(x = 1, y = 2) != 1) {
+        return "fail2"
+    }
+    if (test(y = 2, x = 1) != 1) {
+        return "fail3"
+    }
+    return "OK"
+}