[yocto] Milestone releases FYI

[Flanagan, Elizabeth]

The current milestone release builders have a slight bug in a script called the final build steps that generate the release tarball. I found it this afternoon after milestone-internal failed on tarball generation. I'll have to fix this on monday, but in the meantime, I've run the fixed script by hand on the internal and will fix the one on external and run it by hand tomorrow after milestone-external finishes up. 

-b