Compile Qt examples against the Ubuntu touch target and try to launch the example on the device.

Bug:

phablet@ubuntu-phablet:~/work/install/lib$ ./samegame --desktop_file_hint=/usr/share/applications/mediaplayer-app.desktop
Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
INFO: Listening on port 7654 for incoming connections
No such plugin for spec "squish:7654"
Bus error (core dumped)

Bug can be reproduced with the following examples:

5.8/Src/qtdeclarative/examples/quick/window/window
5.8/Src/qtdeclarative/examples/quick/demos/samegame/samegame
5.8/Src/qtdeclarative/examples/quick/demos/photoviewer/photoviewer
5.8/Src/qtdeclarative/examples/quick/demos/stocqt/stocqt
5.8/Src/qtdeclarative/examples/quick/demos/maroon/maroon
5.8/Src/qtquickcontrols/examples/quickcontrols/extras/flat/flat
5.8/Src/qtdeclarative/examples/quick/text/text
5.8/Src/qtdeclarative/examples/quick/demos/tweetsearch/tweetsearch
5.8/Src/qtquickcontrols/examples/quickcontrols/controls/tableview/tableview
5.8/Src/qtdeclarative/examples/quick/demos/calqlatr/calqlatr

Other tested Qt examples work ok.