Send darwin regression mail to normal lists

Previously it was only sent to the all regressions list. The non-deterministic
errors have been cleaned up so it makes sense to send it to all.
Merge pull request #739 from ronawho/darwin-regression-mail

Send darwin regression mail to normal lists

[trivial, not reviewed]

Previously it was only sent to the all regressions list. The non-deterministic
errors have been cleaned up so it makes sense to send it to all.