manifest: Add xhost
manifest: Add xhost

See https://bugzilla.gnome.org/show_bug.cgi?id=651431

chergert/gnome-continuous,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous