install: Explicitly disable g-i cairo support
install: Explicitly disable g-i cairo support

Since this moduleset is targeted for RHEL6.

GNOME/gnome-ostree,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,djdeath/gnome-ostree,djdeath/gnome-ostree,chergert/gnome-continuous,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,GNOME/gnome-ostree,djdeath/gnome-ostree,GNOME/gnome-ostree