[PATCH 4/5] linux: Replace zero-length array with flexible-array member on struct dirstream

[Florian Weimer]

* Cristian Rodríguez via Libc-alpha:

> The linux kernel has always required a compiler supporting c99
> flexible-arrays.

This is not an installed header, so this commit message is misleading.
Why __attribute_nonstring__?

Thanks,
Florian