[Bug 51846] Standard library call fopen(..., "wx") not recognized - causes destruction of data

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51846

--- Comment #11 from Piotr Caban  ---
I don't think mingw needs to be used at all. You already have the test
application. Wine tests are already linking to the correct dll.

It looks like the only problem left is fixing the tests for older version of
ucrtbase (because old versions of ucrtbase doesn't support x mode).