[PATCH] <dirent.h>: Remove wrong comment about getdents64() declaration

[Florian Weimer]

* Petr Vorel:

> BTW I've noticed discussion on ML about dropping ChangeLogs,
> but I guess it'll be dropped after 2.31 release.

I'm not sure about that yet.  But it was easy to add the ChangeLog entry
so that I could push the fix now.

Thanks,
Florian