bpf: sync tools/include/uapi/linux/bpf.h

Sync bpf.h for nr_prog_tags and prog_tags.

Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>