When building abyss feature, the following error occurs:
xmlrpc_server_abyss.c:783:13: warning: format not a string literal and
no format arguments [-Wformat-security]
783 | xmlrpc_faultf(envP, error);
Add a patch fixing the format parameter.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>