qt5quickcontrols2: fix examples compile without Qt widgets module
Add upstream suggested patch to fix flatstyle example configure
(needs widgets module).
Fixes:
cd flatstyle/ && ( test -e Makefile || .../host/bin/qmake -o Makefile .../build/qt5quickcontrols2-5.9.2/examples/quickcontrols2/flatstyle/flatstyle.pro ) && make -f Makefile
Project ERROR: Unknown module(s) in QT: widgets
make[1]: *** [Makefile:202: sub-flatstyle-make_first] Error 3
make[1]: Leaving directory '.../build/qt5quickcontrols2-5.9.2/examples/quickcontrols2'
make: *** [Makefile:45: sub-quickcontrols2-make_first] Error 2
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
[Thomas: move patch to 5.9.3 directory, since we've bumped
qtquickcontrols2 since then.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>