Alessandro Decina 73c48a5029 bpf: add support for BPF_PROG_TYPE_CGROUP_SKB programs
Example:

fn cgroup_skb_egress(skb: SkSkbContext) -> i32 {
    // allow data to go through
    1
}
..
expand.rs bpf: add support for BPF_PROG_TYPE_CGROUP_SKB programs
lib.rs bpf: add support for BPF_PROG_TYPE_CGROUP_SKB programs