CBLT-319:  it's x86, not x68

Change-Id: Ie4b7f9663518b1a50cd82d589009947267abcc19
Reviewed-on: http://review.couchbase.org/38622
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>