[PATCH v2 0/3] MR5915: include: Tweak atexit and cpuid declarations, guard DECLSPEC_UUID definition.

[Rémi Bernon]

IIUC atexit isn't exported by ucrtbase, but still exists (maybe as a builtin) and is resolved to a module-local symbol which can be used to register functions executed on module process detach. It is called implicitly by C++ compilers to register static destructors.

--
  v2: include: Define __cpuid(ex) as intrinsics when _MSC_VER is defined.
      include: Don't import atexit when building with ucrtbase.
      include: Guard rpcndr.h DECLSPEC_UUID definition.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/5915