Add --enable-libsoup-client-certs
Add --enable-libsoup-client-certs

The goal of this is to hard-fail if the API isn't present in the
buildroot, as some downstreams may explicitly require it.

leandrosansilva/ostree,GNOME/ostree,GNOME/ostree,leandrosansilva/ostree,sujitfulse/ostree,sujitfulse/ostree,leandrosansilva/ostree,resin-io/ostree,leandrosansilva/ostree,gatispaeglis/ostree,leandrosansilva/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,sujitfulse/ostree,gatispaeglis/ostree,resin-io/ostree,sujitfulse/ostree,gatispaeglis/ostree,resin-io/ostree,gatispaeglis/ostree,resin-io/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree