CBLT-319:  fix up bldnum/jobnum confusion for iOS builds

Change-Id: I041045913348994cb3cb778b367a95591de84aa4
Reviewed-on: http://review.couchbase.org/39329
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>