Fix toybuild manifest file

Change-Id: Ia8296144e293556c32aaf0780ddafdd7f24f728b
Reviewed-on: http://review.couchbase.org/26456
Reviewed-by: Junyi Xie <junyi.couchbase@gmail.com>
Tested-by: Junyi Xie <junyi.couchbase@gmail.com>