The yocto-autobuilder-helper for rocko has beaglebone machine defined as beagelbone-yocto
patch sent to yocto mailing list
http://errors.yoctoproject.org/Errors/Details/185969/
Thanks, merged: http://git.yoctoproject.org/cgit.cgi/yocto-autobuilder-helper/commit/?h=rocko&id=4c4079bd1f3ceb226ffee5bbf3953ed14a06f8a8