This update of gnome-online-accounts to version 3.20.8 provides the
following fixes:

- Fix some errors when creating facebook accounts by making it work with Graph API 2.3
and newer. (bsc#1069269)
- Don't leak the name_owner and result in dbus_proxy_reload_properties_sync
- Fix a memory leak in goa-daemon.
- Fix a broken error handling in on_got_identity_for_sign_out.
- Don't leak the invocation when handling ExchangeSecretKeys and SignOut.

This update was imported from the SUSE:SLE-12-SP2:Update update project.