[Merge] lp:~fboucault/qtubuntu/offscreen_surface into lp:qtubuntu

[Unity8 CI Bot]

Review: Needs Fixing continuous-integration

FAILED: Continuous integration, rev:255
https://unity8-jenkins.ubuntu.com/job/lp-qtubuntu-1-ci/6/
Executed test runs:

Click here to trigger a rebuild:
https://unity8-jenkins.ubuntu.com/job/lp-qtubuntu-1-ci/6/rebuild

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https://code.launchpad.net/~fboucault/qtubuntu/offscreen_surface/+merge/250605
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