Do not build the examples other than on Windows
Do not build the examples other than on Windows

Change-Id: Iba532311fdbcd2cb1aae46f0e275b330e499b599
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@digia.com>

kobolabs/qtwinextras,kobolabs/qtwinextras