gnu: gajim: Fix credentials management.

* gnu/packages/messaging.scm (gajim)[inputs]: Remove gnome-keyring.
Add libsecret.

Signed-off-by: 宋文武 <iyzsong@member.fsf.org>

gnu/packages/messaging.scm

@@ -1052,7 +1052,6 @@ of xmpppy.")
        ("geoclue" ,geoclue)
        ("glib" ,glib)
        ("glib-networking" ,glib-networking)
-       ("gnome-keyring" ,gnome-keyring)
        ("gsettings-desktop-schemas" ,gsettings-desktop-schemas)
        ("gsound",gsound)
        ("gspell" ,gspell)
@@ -1060,6 +1059,7 @@ of xmpppy.")
        ("gst-plugins-base" ,gst-plugins-base)
        ("gtk+" ,gtk+)
        ("gupnp-igd" ,gupnp-igd)
+       ("libsecret" ,libsecret)
        ("libsoup" ,libsoup)
        ("libxss" ,libxscrnsaver)
        ("network-manager" ,network-manager)