Use C99 standard PRI*64 for printing 64 bit integers

Use C99 standard PRI*64 for printing 64 bit integers

Use the standard C99 PRI*64 macros instead of checking for specific GNU
libc version. We also specifically check for windows which does not have
proper C99 support.

This fixes printing of int64 on non-GNU 32 bit systems (like musl libc).

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=92043
Reviewed-by: Thiago Macieira <thiago@kde.org>
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
[smcv: fix extra % in the Windows fallbacks; include <inttypes.h> where needed]