Disable/blacklist failing tests for boot2qt

Currently boot2qt is tested with QEMU and some tests fail. Disabling
them for now to make it possible to enable qt5 tests for Coin.

Task-number: QTBUG-60266
Change-Id: I91a61bfb99b2629cb549b76d60c24f1d5f8c3ad8
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>