MB-100: fix toybuild manifest for MB-8825

Change-Id: I741bcac16695e5d3b084fdc762b257fab431fd6a
Reviewed-on: http://review.couchbase.org/28273
Reviewed-by: Junyi Xie <junyi.couchbase@gmail.com>
Tested-by: Junyi Xie <junyi.couchbase@gmail.com>