[epiphany/mcatanzaro/libportal-update] Update flatpak manifests for latest libportal

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 41c0f5139cb02cbc2e84ccc02d372263ec50151d
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Tue Nov 9 13:42:08 2021 -0600

    Update flatpak manifests for latest libportal
    
    Fixes #1621

 org.gnome.Epiphany.Canary.json.in | 1 +
 org.gnome.Epiphany.json           | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/org.gnome.Epiphany.Canary.json.in b/org.gnome.Epiphany.Canary.json.in
index 022e649b6..e1fcc6e23 100644
--- a/org.gnome.Epiphany.Canary.json.in
+++ b/org.gnome.Epiphany.Canary.json.in
@@ -106,6 +106,7 @@
             "name" : "libportal",
             "buildsystem" : "meson",
             "config-opts" : [
+                "-Dbackends=['gtk3']",
                 "-Dgtk_doc=false"
             ],
             "sources" : [
diff --git a/org.gnome.Epiphany.json b/org.gnome.Epiphany.json
index 77993c115..3ef1fea8a 100644
--- a/org.gnome.Epiphany.json
+++ b/org.gnome.Epiphany.json
@@ -103,6 +103,7 @@
             "name" : "libportal",
             "buildsystem" : "meson",
             "config-opts" : [
+                "-Dbackends=['gtk3']",
                 "-Dgtk_doc=false"
             ],
             "sources" : [