Master build appears to be failing after invoking wheelhouse_uploader

[jni]

See e.g.

https://travis-ci.org/github/scikit-image/scikit-image-wheels/jobs/710629076#L718

There is no visible error message, though.

@matthew-brett any ideas about what could be going wrong here?

[matthew-brett]

I see this in the log:

�[0K$ travis_wait 40 python -m wheelhouse_uploader upload --local-folder ${TRAVIS_BUILD_DIR}/wheelhouse/ $UPLOAD_ARGS $CONTAINER


Still running (1 of 40): python -m wheelhouse_uploader upload --local-folder /home/travis/build/scikit-image/scikit-image-wheels/wheelhouse/ pre-release

So - is it timing out? @ogrisel - any ideas?