Avoid ${WRKBUILD}/tmp/out.tar.lz consuming all disk space

Index: testsuite/check.sh
--- testsuite/check.sh.orig
+++ testsuite/check.sh
@@ -1110,8 +1110,10 @@ if [ "${ln_works}" = yes ] ; then
 	"${TARLZ}" -xf "${testdir}"/ts_in_link.tar.lz || test_failed $LINENO
 	"${TARLZ}" -df "${testdir}"/ts_in_link.tar.lz --ignore-ids ||
 		test_failed $LINENO
+echo -n '\nSKIP archiving the root disk (link1 points to /):
 	"${TARLZ}" -0 -cf out.tar.lz link1 link2 link3 link4 || test_failed $LINENO
 	"${TARLZ}" -df out.tar.lz || test_failed $LINENO
+'
 	rm -f out.tar.lz link1 link2 link3 link4 || framework_failure
 fi