QNX 7.1 (gcc 8.3.0) target reference HW NXP iMX8QM (ARM-v8A-64bit).

What
As a PM I want QNX 7.1 to be technologically ready with Qt 6.1

Why
Must for Qt Automotive business, should for medical, nice for rest

When
Technology Preview Qt 6.1 5/2021 - priority P3 QTBUG-87468
Delivery in Qt 6.2 11/2021 - priority P1 (Blocker) (THIS TICKET)

Definition of Done
Qt6 source codes compile on reference target. Customer can develop software with QNX 7.1

• Qt sources same as in all platforms (mandatory, same in Qt 5)
• Binaries, smoke tested (mandatory, same in Qt 5)
• CI tests on desktop host (optional, improve for Qt6)
  • Qt Core, Qt GUI, Qt Network, Qt QML, Qt Quick, Qt Quick Controls, Qt Quick Layouts, Qt Quick 3D modules compile
  • x86_64, arm64v8a, armv7
• Hosts (desktop): Ubuntu 20.04 (mandatory), Win10 2004 (optional) based on PM view and RnD capability
• Targets (HW): NXP iMX8QM (mandatory, new compared to Qt6)
• RnD support: for mandatory hosts and targets Standard, rest up to PS