[gnome-contacts] Flatpak: Add workaround for a goa issue.

[Jordan Petridis <jpetridis src gnome org>]

commit f099800a788210b3cdf2945a3e4b4ebce3572cf1
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Wed Jul 25 02:01:05 2018 +0000

    Flatpak: Add workaround for a goa issue.
    
    gnome-online-accounts produces a ton of warnings about
    _FORTIFY_SOURCE cause the build to fail.
    
    https://gitlab.gnome.org/GNOME/gnome-online-accounts/issues/10

 data/flatpak/org.gnome.Contacts.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/flatpak/org.gnome.Contacts.json b/data/flatpak/org.gnome.Contacts.json
index c84aba5..5aa5da3 100644
--- a/data/flatpak/org.gnome.Contacts.json
+++ b/data/flatpak/org.gnome.Contacts.json
@@ -89,6 +89,7 @@
             "name": "gnome-online-accounts",
             "cleanup": [ "/bin", "/share/GConf" ],
             "config-opts": [
+                "--disable-Werror",
                 "--disable-telepathy",
                 "--disable-documentation",
                 "--disable-backend"