include(annotations.php): failed to open stream: No such file or directory

With current master I always get two "silenced errors" in symfony profiler:

![screenshot 2016-08-04 16 18 50](https://cloud.githubusercontent.com/assets/330436/17405505/07ddea24-5a60-11e6-8931-f3a013d71f3f.png)

I guess it is related to #18533, ping @tgalopin.
