add the scripts we use to build the wheels in jenkins to version control (#2896)

* add the scripts we use to build the wheels in jenkins to version control

These scripts will get some updates shortly to simplify life on the OS X
side, but for now it's just a copy of exactly what the job currently
does. Once this is merged I can switch the job to just invoke these
scripts.

* rename script and update to what we're currently using to make whls
2 files changed