[gnome-documents] flatpak: Build liboauth against NSS

[Jordan Petridis <jpetridis src gnome org>]

commit e5892de98ae58b2cfa631106128d04aeea32dbda
Author: Jordan Petridis <jpetridis gnome org>
Date:   Thu Sep 27 00:46:16 2018 +0300

    flatpak: Build liboauth against NSS
    
    Currently available versions of liboauth, such as 1.0.3, don't build
    against OpenSSL 1.1.0, and that has been failing the nightly builds.
    It does work with NSS, though; and, for what it's worth, Fedora builds
    liboauth against NSS too.
    
    https://github.com/x42/liboauth/issues/9

 flatpak/org.gnome.Books.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/flatpak/org.gnome.Books.json b/flatpak/org.gnome.Books.json
index 4dbc22e8..3fbc4615 100644
--- a/flatpak/org.gnome.Books.json
+++ b/flatpak/org.gnome.Books.json
@@ -67,6 +67,7 @@
         },
         {
             "name": "liboauth",
+            "config-opts": [ "--enable-nss" ],
             "sources": [
                 {
                     "type": "archive",