LU-9950 build: add support for Ubuntu(debian) arm64

LU-9950 build: add support for Ubuntu(debian) arm64

Add arm64 into the support arch list of debian control file.

Lustre-change: https://review.whamcloud.com/28870
Lustre-commit: ba4b4eaacc37bc29b6d99f24b0f6451c758f9c4a

Change-Id: I9c39a4d8c1896c1255432380bd956330c2edf476
Signed-off-by: Gu Zheng <gzheng@ddn.com>
Reviewed-by: Yingjin Qian <qian@ddn.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Thomas Stibor <t.stibor@gsi.de>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/32101
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>