Do not use a qml subfolder for qtquick applications.

The subfolder triggers some unfortunate issues, like that the default
path that is chosen for adding files to the '/' prefix in the qrc is the
project directory.

Change-Id: Ia0010e01c37afb64506053014eae4524794e57d8
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>