configure: check for bpf_tc_attach() in libbpf

We want to be able to use the new bpf_tc_attach() function for attaching TC
programs, so check for it in configure.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>

configure

@@ -83,6 +83,7 @@ int main(int argc, char **argv) {
     (void) bpf_program__name(ptr);
     (void) bpf_map__set_initial_value(ptr, ptr, 0);
     (void) bpf_set_link_xdp_fd_opts(0, 0, 0, &lopts);
+    (void) bpf_tc_attach(ptr, ptr);
     return 0;
 }
 EOF