Add XOS repo as submodule and support arm64

Add XOS repo as submodule and support arm64

1.forked SEBA componants`s repo to IEC repo,include:
xos,xos-tosca,cord-tester,xos-gui,xos-rest-gw

2.Add patch files inorder to aarch64 docker image support
        src/use_cases/seba_on_arm/src_repo/cord-tester
        src/use_cases/seba_on_arm/src_repo/xos
        src/use_cases/seba_on_arm/src_repo/xos-gui
        src/use_cases/seba_on_arm/src_repo/xos-tosca
        src/use_cases/seba_on_arm/src_repo/xos-ws
        src/use_cases/seba_on_arm/docker/build/cord-tester/
        src/use_cases/seba_on_arm/docker/build/xos-gui/
        src/use_cases/seba_on_arm/docker/build/xos-tosca/
        src/use_cases/seba_on_arm/docker/build/xos-ws/
        src/use_cases/seba_on_arm/docker/build/xos/

Change-Id: I1a0f7c8e5983aab830dfff34bc2127477f37768f
Signed-off-by: jialv01 <Jianlin.Lv@arm.com>