various: add GLIB_AVAILABLE_IN_ALL everywhere else

Add the GLIB_AVAILABLE_IN_ALL annotation to all old functions (that
haven't already been annotated with the GLIB_AVAILABLE_IN_* macros or a
deprecation macro).

If we discover in the future that we cannot use only one macro on
Windows, it will be an easy sed patch to fix that.

https://bugzilla.gnome.org/show_bug.cgi?id=688681

gio/gtlsfiledatabase.h

@@ -46,8 +46,10 @@ struct _GTlsFileDatabaseInterface
   gpointer padding[8];
 };
 
+GLIB_AVAILABLE_IN_ALL
 GType                        g_tls_file_database_get_type              (void) G_GNUC_CONST;
 
+GLIB_AVAILABLE_IN_ALL
 GTlsDatabase*                g_tls_file_database_new                   (const gchar  *anchors,
                                                                         GError      **error);