[rel-2.1.1] fix MB-8465 by switching to right sigar & portsigar

Change-Id: Ib6b7bca88101771d75e41a1c8d8f3904d94c2222
Reviewed-on: http://review.couchbase.org/27512
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Philip Labee <philip@couchbase.com>