[PATCH] ucrtbase: Implement t and j printf length modifiers.

[Ambrož Bizjak]

Hi,
This adds support for t (ptrdiff_t) and j (intmax_t/uintmax_t) length
modifiers. This fixes an issue in Planet Coaster where many in-game
values would otherwise show as "jd". I've confirmed the fix works
within Steam Play with a local Proton build.

These length modifiers have appeared in VS2015 together with z, so
putting the code under "_MSVCR_VER >= 140" seems correct. Tests are
included and they passed for me on 32-bit and 64-bit.

Regards,
Ambroz Bizjak

[Piotr Caban]

Hi Ambrož,

The patch looks mostly good to me but it's required that you add 
signed-off-by line 
(https://wiki.winehq.org/Submitting_Patches#The_commit_message).

What's the reason for changing:
if (sizeof(void*) == 8)
to
#ifdef _WIN64
?
I think it's better to keep it as is so the code is always compiled.

Thanks,
Piotr