ltp/fsx: output the seed value after logid is initialized

ltp/fsx: output the seed value after logid is initialized

When running multiple fsx processes simultaneously (e.g.
generic/455), it is difficult to tell the seed value for one fsx
process if the seed value is needed to reproduce a log-replay
failure.

Fix it by outputting the seed value after logid is initialized.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>