add arm64 for docker image

[medyagh]

can you please build the image to be multi-arch?

$ docker run -it --rm \
>   --privileged \
>   -v /lib/modules:/lib/modules:ro \
>   -v /usr/src:/usr/src:ro \
>   -v /etc/localtime:/etc/localtime:ro \
>   --workdir /usr/share/bcc/tools \
>   zlim/bcc
WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
exec /entrypoint.sh: exec format error