Fix tcpretrans gadget

[mauriciovasquezbernal]

The checked eBPF object defines the map as "ig_sockets", but it was renamed to gadget_sockets.

$ strings gadgets/trace_tcpretrans_x86.bpf.o | grep ig_sockets
ig_sockets
ig_sockets
	return bpf_map_lookup_elem(&ig_sockets, &key);
ig_sockets

This was causing the event to be missing the process data, like task and container name:

$ go run -exec 'sudo -E' ./cmd/ig/... run --prog @./gadgets/trace_tcpretrans_x86.bpf.o --definition @./gadgets/trace_tcpretrans.yaml
INFO[0000] Experimental features enabled
RUNTIME.CONTAINERNAME                                   SRC                           DST                           TASK             PID     UID      GID
                                                        172.17.0.4:36338              1.1.1.1:443                                    0       0        0
                                                        172.17.0.4:36338              1.1.1.1:443                                    0       0        0

Fix it by forcing make to run again.

Fixes f5be9f7 ("Socket enricher for containerized gadgets")

[alban]

Thanks!