Description of the problem / feature request:

Feature requests: what underlying problem are you trying to solve with this feature?

While setting up Bazel RBE with Envoy CI, we want the CI download less artifacts from RBE to save network bandwidth and disk, while we want to be able to inspect testlogs individually.

Currently the setup is --test_output=all and --experimental_remote_download_outputs=minimal so all test outputs are printed to console, the test log are already downloaded but not write to the disk, it would be nice bazel-testlogs is set up, and better with test.xml, so CI system can interpret them.

What operating system are you running Bazel on?

Ubuntu 16.04

What's the output of bazel info release?

release 0.28.0