Roll src/tools/swarming_client/ f71d1a3fb..6e5d2b21f (2 commits) and tools/luci-go.

https://chromium.googlesource.com/external/swarming.client.git/+log/f71d1a3fbe20..6e5d2b21f0ac

$ git log f71d1a3fb..6e5d2b21f --date=short --format='%ad %ae %s'
2015-09-23 maruel Transparently retry 404s when served from CloudEndpoints and not as json.
2015-09-21 maruel Recreate the work dir in run_isolated.py.

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Also update luci-go to 655db76c52c65876f8e803451525b950a7c83f8a to include a
similar fix w.r.t. Endpoints.

R=vadimsh@chromium.org
BUG=522388

Review URL: https://codereview.chromium.org/1369513003

Cr-Commit-Position: refs/heads/master@{#350569}
4 files changed