CBLT-316:  the number of the android target is host-specific

Change-Id: Icf0923c59ff3e18c9b0f00250f76e9b108ef3df0
Reviewed-on: http://review.couchbase.org/38047
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>