Roll tools/swarming_client/ to 2cbc12487aea464730bcf60230f4d4d63d61ac51.

Roll tools/swarming_client/ to 2cbc12487aea464730bcf60230f4d4d63d61ac51.

$ git log c8437bfa4..2cbc12487 --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-07-16 maruel Fix a crash in run_isolated.py when the cache is not used.
2014-07-14 maruel Enforce the use of --priority in run_on_bots.py.
2014-07-11 maruel Fix run_on_bots.py to not assume id == hostname.

R=csharp@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=283690

[csharp, 2014-07-16 15:17:00]

lgtm

[M-A Ruel, 2014-07-16 15:25:59]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2014-07-16 15:26:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/maruel@chromium.org/397043002/1

[commit-bot: I haz the power, 2014-07-17 07:29:41]

Change committed as 283690