[Merge] ~3v1n0/ubuntu/+source/gnome-session:ubuntu/master-fix-install into ~ubuntu-desktop/ubuntu/+source/gnome-session:ubuntu/master

[Sebastien Bacher]

Review: Approve

thanks
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https://code.launchpad.net/~3v1n0/ubuntu/+source/gnome-session/+git/gnome-session/+merge/353513
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