Report progress on STDOUT/STDERR during compilation of individual modules

[saurabhnanda]

Following-up from #426 (comment)

Would it be possible to output a . for every compiled module. Use-cases:

• Avoid hitting timeouts [1] on some CI environments.
• Reporting progress is important for impatient devs :)

[1] https://discuss.circleci.com/t/too-long-with-no-output-while-building-docker-image/12275

[snoyberg]

I'm about to take a stab at #3225, which will address this desire as well.

[snoyberg]

Relevant PR: #4097