e2fsprogs: fix ptest bug for second running

At second running, there are four new failed case:
  d_loaddump f_bigalloc_badinode f_bigalloc_orphan_list f_dup_resize

The test_data.tmp is necessary, but it is deleted by run-ptest.
So it should be restored after testing.

Signed-off-by: Qiu Tingting <qiutt@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit d0d08dd9)
Signed-off-by: Steve Sakoman <steve@sakoman.com>