[gnome-music/wip/jfelder/gnome-online-accounts-meson] flatpak: Use meson to build gnome-online-accounts

[Jean Felder <jfelder src gnome org>]

commit a6668b7ddcc59ab6dc0875bd9e7ed67fee640a70
Author: Jean Felder <jfelder src gnome org>
Date:   Thu Jun 23 12:58:13 2022 +0200

    flatpak: Use meson to build gnome-online-accounts
    
    The autotools build has been dropped.
    
    See:
    https://gitlab.gnome.org/GNOME/gnome-online-accounts/-/merge_requests/89

 org.gnome.Music.json | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/org.gnome.Music.json b/org.gnome.Music.json
index 2177fcc84..9559f7aed 100644
--- a/org.gnome.Music.json
+++ b/org.gnome.Music.json
@@ -65,10 +65,11 @@
         },
         {
             "name": "gnome-online-accounts",
-            "config-opts": [ "--enable-introspection",
-                             "--disable-documentation",
-                             "--disable-backend",
-                             "--disable-Werror" ],
+            "buildsystem": "meson",
+            "config-opts": [ "-Denable-introspection",
+                             "-Ddisable-documentation",
+                             "-Ddisable-backend",
+                             "-Ddisable-Werror" ],
             "sources": [
                 {
                     "type": "git",