Blackbox: Handling global array

Blackbox can now handle global array.

 * main.go : Here.

main.go

@@ -506,7 +506,10 @@ func insertGlobalInBlackbox(meta *transform.Meta, filename string) {
 		fmt.Println(os.Stderr, err.Error())
 		os.Exit(1)
 	}
-	transform.Apply(node, meta, &transform.GlobalToState{GlobalVar: globalVar, GlobalBlackbox: globalObj})
+	transform.ApplyAll(node, meta, []transform.Transform{
+		&transform.GlobalToState{GlobalVar: globalVar, GlobalBlackbox: globalObj},
+		&transform.DoubleBrackets{},
+	})
 	file, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
 	if err != nil {
 		fmt.Println(os.Stderr, err.Error())