Add repo as submodule add patch support arm64

1.forked SEBA componants`s repo to IEC repo,include:
    kafka-exporter,cp-docker-images
2.Create new directory:src/use_cases/seba_on_arm/docker/build
    Store the script to build docker image
3.Create new directory:src/use_cases/seba_on_arm/patches
    This directory holds the patches files of the submodules
4.Add patch files inorder to aarch64 docker image support
    patches/kafka-exporter/0001-modify-Makefile-for-aarch64-support.patch
    build/cp-docker-images/build.arm
    build/kafka-exporter/build.arm

Change-Id: I53db4a633ba0a39f0bb2e8c8b17b3f5271fba2b1
Signed-off-by: jialv01 <Jianlin.Lv@arm.com>