ci/bare-metal: suppress 'No such file or directory'

It fills the serial log with unimportant messages.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7347>
1 file changed