CBD-1207:  now using for v8:  revision="refs/tags/3.21.17"

Change-Id: Ib62d57601146feccace847ba026b40e7a78fd125
Reviewed-on: http://review.couchbase.org/32781
Reviewed-by: Sarath Lakshman <sarath@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>