xdp-tools: add dnsdist_xdp.bpf.o

upgrade xdp-tools to 1.5.5 and add dnsdist_xdp.bpf.o
for dnsdist xsk AF_XDP

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>

config/rootfiles/common/xdp-tools

@@ -9,6 +9,7 @@ usr/lib/bpf/xdp_udpddos.bpf.o
 usr/lib/bpf/xdp_tailcall.bpf.o
 usr/lib/bpf/xdp_synproxy_tailcall.bpf.o
 usr/lib/bpf/xdp_ddos.bpf.o
+usr/lib/bpf/dnsdist_xdp.bpf.o
 usr/sbin/xdp-udp
 usr/sbin/xdp_dns
 usr/sbin/xdp_dns_log