JS backend: add javauitl.kt to bridges/_commonFiles

js/js.translator/testData/bridges/_commonFiles/javautil.kt

@@ -0,0 +1,19 @@
+package java.util
+
+public object Arrays {
+    public fun asList<T>(vararg ts : T) : List<T> {
+        val result = ArrayList<T>()
+        for (t in ts) {
+            result.add(t)
+        }
+        return result
+    }
+}
+
+public fun ArrayList<T>(c: Collection<T>): ArrayList<T> {
+    val result = ArrayList<T>()
+    for (t in c) {
+        result.add(t)
+    }
+    return result
+}