Puts coveralls token in the config.
Puts coveralls token in the config.

We want PRs to be able to get coverage reports, but not open up all private
environment variables from CircleCI.  There's no way to hide a subset of
environment variables per job or workflow, so we'll put the env var here; it's
less obscure but strictly not any less secure than sharing environment with
forks/PRs.

SuperQ/mtail,google/mtail,google/mtail,SuperQ/mtail