LU-15293 build: Add build support for arm64 centos8

LU-15293 build: Add build support for arm64 centos8

This patch adds lbuid support for latest Arm64 CentOS 8.4, 8.5.

Also fix build doesn't use Lustre provided kernel config file
on CentOS8.

Test-Parameters: trivial

Test-Parameters: env=SANITY_EXCEPT="101j" \
 clientdistro=el8.5 serverdistro=el8.5 testlist=sanity

Change-Id: I95c7aa7e77ea1cc7a99fdaacc2220e14d2db6185
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Reviewed-on: https://review.whamcloud.com/45691
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>