Changes for building meta-agl-demo with YP 2.1.1 'krogoth'

Changes for building meta-agl-demo with YP 2.1.1 'krogoth'

    Update meta-agl-demo for YP 2.1 'krogoth'

    Notable changes:
    - update qtbase wrt packageconfig flags
    - qtwayland needs the patches checked/ported
    - remove qtwayland examples from packagegroup-agl-appfw-native

    TODO:
    - Check graphic driver stack (mesa, wayland, weston, qtbase, qtwayland et al.)
    - Check wrt SPEC-237
    - port patches for qtwayland
    - check where qtwayland-examples is gone and either remove or re-add

Change-Id: Ib14f1230d0fdc84f82af3e875460c0269faec652
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>