Fix make distclean Makefile.am removal

The file tests/zfs-tests/tests/stress/Makefile.am gets mistakenly
removed by the distclean target because it's empty.  Adding a
`SUBDIRS =` line prevents the removal.

This directory is being preserved as the location to add assorted
stress tests.  These may include but are not limited to.

  http://kernel.ubuntu.com/~cking/stress-ng/
  https://github.com/zfsonlinux/zfsstress/

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #5308

diff --git a/tests/zfs-tests/tests/stress/Makefile.am b/tests/zfs-tests/tests/stress/Makefile.am
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..741f8508560924ad28c333eab697148b64166adc 100644 (file)
--- a/tests/zfs-tests/tests/stress/Makefile.am
+++ b/tests/zfs-tests/tests/stress/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS =