check: log kernel version in check.log

After collecting several xfstests runs, it's useful to keep track on
which kernel a specific run happened.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>
1 file changed