JS: move more test to box tests

js/js.translator/testData/box/labels/nestedLabels.kt

@@ -0,0 +1,28 @@
+package foo
+
+// CHECK_LABELS_COUNT: function=test name=loop count=1
+// CHECK_LABELS_COUNT: function=test name=loop_0 count=1
+
+fun test() {
+    var i = 0
+    var j = 0
+
+    loop@ for (k in 1..10) {
+        loop@ for (m in 1..10) {
+            if (m == 4) break@loop
+            j = m
+        }
+
+        if (k == 8) break@loop
+        i = k
+    }
+
+    assertEquals(3, j)
+    assertEquals(7, i)
+}
+
+fun box(): String {
+    test()
+
+    return "OK"
+}