bug 1285392 - add nss configuration
bug 1285392 - add nss configuration

Currently set to push to a new repo ('test-nss') in the mozilla org.
Once that is working, and produces the same shas as the existing repo,
the config needs to be updated again.

--HG--
extra : rebase_source : 4936eb0058764810d86b7adf98d7fdd142d6d8e8

mozilla/build-mozharness,mozilla/build-mozharness