LU-17468 lod: component add missed pattern info

LU-17468 lod: component add missed pattern info

"lfs setstripe --commponent-add" missed setting component pattern,
which causes some setting missing, like overstriping.

Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Change-Id: I7ad746a550f1afea54a6f5b68823a79a85a44082
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53817
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Artem Blagodarenko <ablagodarenko@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>