These come originally from https://github.com/travis-ci/travis-build and are
available when running on Travis, but not when running inside a Docker
container on Travis as we do in order to build for Android.
The goal is to provide a quasi heart-beat on STDOUT during very long running
commands - without this the wget to download Qt often times out, so that's
where we are going to use this.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
