Xcode 9 introduced the main thread checker, which detects invalid
use of AppKit, UIKit, and other APIs from background threads.
https://developer.apple.com/documentation/code_diagnostics/main_thread_checker
In our case these are accesses to e.g. [UIView layer] and
[UIScreen scaleFactor] from the render thread of QtQuick,
things we should look at, but that might not be easily solvable.
In any case, these are not warnings the user can do anything about,
so in lack of a per-library disable of the checker, we have to
globally disable it for the whole Xcode project.
Task-number: QTBUG-63822
Change-Id: Ibfcdf23891cf6bfbbc9b9b3349e4c256c273c7de
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
31cc29e9be