JS backend: add cli test for creating metadata and ant test for library with metadata

compiler/testData/integration/ant/js/simpleWithoutStdlibAndFolderAsAnotherLib/root1/foo.kt

@@ -0,0 +1,14 @@
+package foo
+
+import library.sample.*
+
+var ok = "FAIL"
+
+fun main(args: Array<String>) {
+    val x = ClassA().value
+    if (x == 100) {
+        ok = "OK"
+    }
+}
+
+fun box(): String = ok