msvcrt: Add implementation of _strncoll

[Vitaly Perov]

Hi,
Thank you very much for your answer!

> strncoll is used to compare at most count characters (you can't access
> data after nullbyte). You're not null terminating nstr1 and nstr2 strings.
>
Yes, I forgott this. Thank you.

> This function should be implemented without memory allocations.
Why? I don't think it is possible to implement it without any memory 
allocations.

-- 
Best regards,
Vitaly Perov