bpf: Test new fields in bpf_attr and bpf_{prog, map}_info

This patch tests newly added fields of the bpf_attr,
bpf_prog_info and bpf_map_info.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>