[Bug 1377367] fontconfig cache in /var incompatible with ostree model; unable to `rpm-ostree install emacs`

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1377367

Colin Walters  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
                   |                            |ect.org,
                   |                            |[e-mail]
                   |                            |ct.org, [e-mail],
                   |                            |[e-mail]
          Component|rpm-ostree                  |fontconfig
           Assignee|[e-mail]          |[e-mail]

--- Comment #1 from Colin Walters  ---
For this we need to move the fontconfig cache to /usr.  See
https://git.gnome.org/browse/gnome-continuous/tree/manifest.json?id=6d10d44c...