Send darwin regression mail to normal lists (for gasnet.darwin)

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 the normal lists.

Same idea as 7ad1f14e2a6f5febba3a03754c3487b5be7869f4, but I missed this file
Merge pull request #898 from ronawho/darwin-regression-mail

Send darwin regression mail to normal lists (for gasnet.darwin)

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 the normal lists.

Same idea as 7ad1f14e2a6f5febba3a03754c3487b5be7869f4, but I missed this file