[PATCH 1/4] msvcrt/tests: Restore the multibyte codepage after the tests.

[Piotr Caban]

Hi Akihiro,

It looks like you're working around a bug in setlocale implementation. 
Is mbcp ever changed on Windows during this tests (it's not on testbot)? 
It's better to add a test for that and fix the implementation.

Thanks,
Piotr