prdb_verify -rebuild with supergroups fix

prdb_verify -rebuild with supergroups fix

This change eliminates the redundant iteration over the
supergroup[] array in DumpRecreate. By iterating over both
this array and entries[], duplicate au lines are created
and the count variable becomes incorrect. Furthermore,
the au lines created in the supergroups[] section were
incorrectly in the form of au <group> <member> instead
of au <member> <group>.

FIXES 126500

Change-Id: I087772b63934406273f153f4b8a581d965f1e4d5
Reviewed-on: http://gerrit.openafs.org/1316
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Tested-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Alistair Ferguson <alistair.ferguson@mac.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>