[Development] qtbase auto tests on UWP (formerly known as WinRT) enabled

[Oliver Wolff]

Hi,

yesterday I merged a change, that enables execution of qtbase auto tests 
on UWP (formerly known as WinRT).

The used configuration uses MSVC 2015 so error messages should be 
somewhat familiar, but some UWP headers tend to give weird error 
messages. If you run into a problem you cannot fix yourself, please just 
ping on #qt-winrt on freenode or send me a mail.

I have already seen on integration which fails due to the WinRT config 
(https://codereview.qt-project.org/#/c/233249/) and am currently having 
a look at what's wrong there.

BR,
Olli