Squashed 'external/workload-automation/' changes from b03f28d1d..2d14c82f9

2d14c82f9 Added option to re-open files to poller.
8598d1ba3 speedometer: Add version 3.0 support
523fb3f65 speedometer: Introduce trivial cleanups
0732fa9cf workloads/geekbench: Add support for Geekbench command-line build

git-subtree-dir: external/workload-automation
git-subtree-split: 2d14c82f92f3b71089550671773c5718b7e4514a