[PATCH 0/1] MR2540: include: Define __has_attribute() if the compiler does not provide it.

[Zebediah Figura (＠zfigura)]

Fixes: f4c3801495f4fe17a10e2f21339de3b511c78339

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54666