Don't check autogenerated files in tests

CI builds for this MR are here: https://ci.ubports.com/job/UBportsCore/job/lomiri-api/view/change-requests/job/MR-12/

whitespace test fail on autogenerated qmlcompiler files

Test project /home/neochapay/work/ubuntu/lomiri-api/obj-x86_64-linux-gnu
    Start 24: whitespace
1/1 Test #24: whitespace .......................***Failed    0.07 sec
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/modules/TestUtil/TestUtilQml_autogen/moc_predefs.h: bad whitespace in lines 87, 194
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/modules/TestUtil/TestUtilQml_autogen/EWIEGA46WW/moc_TestUtilPlugin.cpp: bad whitespace in lines 101, 103, 104, 105, 106, 107, 108, 110, 111, 112
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Launcher/LauncherMocks_autogen/moc_predefs.h: bad whitespace in lines 86, 194
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Launcher/TestLauncherPlugin_autogen/moc_predefs.h: bad whitespace in lines 87, 195
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Launcher/TestLauncherPlugin_autogen/EWIEGA46WW/moc_TestLauncherPlugin.cpp: bad whitespace in multiple lines
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Application/ApplicationMocks_autogen/moc_predefs.h: bad whitespace in lines 86, 194
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Application/TestApplicationPlugin_autogen/moc_predefs.h: bad whitespace in lines 87, 195
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Application/TestApplicationPlugin_autogen/EWIEGA46WW/moc_TestApplicationPlugin.cpp: bad whitespace in multiple lines
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Notifications/TestNotificationsPlugin_autogen/moc_predefs.h: bad whitespace in lines 87, 195
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Notifications/TestNotificationsPlugin_autogen/EWIEGA46WW/moc_TestNotificationsPlugin.cpp: bad whitespace in multiple lines
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Notifications/NotificationsMocks_autogen/moc_predefs.h: bad whitespace in lines 85, 192
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Notifications/Mocks/MockNotificationsPlugin_autogen/moc_predefs.h: bad whitespace in lines 87, 194
/home/neochapay/work/ubuntu/lomiri-api/build/test/qmltest/mocks/plugins/Lomiri/Notifications/Mocks/MockNotificationsPlugin_autogen/EWIEGA46WW/moc_MockNotificationsPlugin.cpp: bad whitespace in multiple lines