JS: move more test to box tests

js/js.translator/testData/box/simple/continueWhile.kt

@@ -0,0 +1,15 @@
+package foo
+
+fun box(): String {
+    var i = 0
+    var b = true
+    while (i < 100) {
+        ++i;
+        if (i >= 1) {
+            continue;
+        }
+        b = false;
+    }
+
+    return if (b) "OK" else "fail"
+}