[QtApplicationManager] 5.15 branch build fail for device images

Latest Qt Application 5.15 branch head (5820ee2dc4f0dcf1a1d2679351cfae293a5143f3) failed to compile for device images:

•  intel-corei7-64
• jetson-tx2
• apalis-imx6

 
{{ 12:30:20 /home/qt/work/build/tmp/work/cortexa9t2hf-neon-poky-linux-gnueabi/qtapplicationmanager/5.15.1+gitAUTOINC+5820ee2dc4-r0/git/src/launcher-lib/waylandqtamclientextension.cpp: In member function 'virtual bool QtAM::WaylandQtAMClientExtension::eventFilter(QObject*, QEvent*)':12:30:20 /home/qt/work/build/tmp/work/cortexa9t2hf-neon-poky-linux-gnueabi/qtapplicationmanager/5.15.1+gitAUTOINC+5820ee2dc4-r0/git/src/launcher-lib/waylandqtamclientextension.cpp:73:42: error: invalid static_cast from type 'QEvent*' to type 'QExposeEvent*'}}

12:30:20 73 | if (static_cast<QExposeEvent >(e)->region().isNull())*

12:30:20 | ^

12:30:20 In file included from /home/qt/work/build/tmp/work/cortexa9t2hf-neon-poky-linux-gnueabi/qtapplicationmanager/5.15.1+gitAUTOINC+5820ee2dc4-r0/recipe-sysroot/usr/include/qt5/QtGui/QWindow:1,

12:30:20 from /home/qt/work/build/tmp/work/cortexa9t2hf-neon-poky-linux-gnueabi/qtapplicationmanager/5.15.1+gitAUTOINC+5820ee2dc4-r0/git/src/launcher-lib/waylandqtamclientextension.cpp:45:

12:30:20 /home/qt/work/build/tmp/work/cortexa9t2hf-neon-poky-linux-gnueabi/qtapplicationmanager/5.15.1+gitAUTOINC+5820ee2dc4-r0/recipe-sysroot/usr/include/qt5/QtGui/qwindow.h:66:7: note: class type 'QExposeEvent' is incomplete*12:30:20* 66 | class QExposeEvent;

12:30:20 | ^~~~~~~~~~~~

12:30:20 Makefile:758: recipe for target '.obj/waylandqtamclientextension.o' failed*12:30:20* make[2]: *** [.obj/waylandqtamclientextension.o] Error 1