[PATCH v2] sys/platform/x86.h: Do not depend on _Bool definition in C++ mode

[Florian Weimer]

* H. J. Lu:

> Clang does not define _Bool for -std=c++98:
>
> /usr/include/bits/platform/features.h:31:19: error: unknown type name '_Bool'
>    31 | static __inline__ _Bool
>       |                   ^
>
> Change _Bool to bool to silence clang++ error.
>
> Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

Looks okay to me.

Reviewed-by: Florian Weimer <fweimer@redhat.com>

Thanks,
Florian