Roll tools/swarming_client/ to efdc5287c8057d1eceba48a32764276e262da445.

Roll tools/swarming_client/ to efdc5287c8057d1eceba48a32764276e262da445.

$ git log b10edf25e..efdc5287c --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-12-12 maruel Redo the way commands are triggered and add support for not using isolate server

R=vadimsh@chromium.org
BUG=

Committed: https://crrev.com/1328cb0fa69f37e6ea544ca7cd5a4773b29e4cd8
Cr-Commit-Position: refs/heads/master@{#308418}

[Vadim Sh., 2014-12-15 20:14:34]

lgtm

[M-A Ruel, 2014-12-15 20:15:20]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2014-12-15 20:16:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/800223004/1

[commit-bot: I haz the power, 2014-12-15 21:17:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-15 21:18:17]

Patchset 1 (id:??) landed as
https://crrev.com/1328cb0fa69f37e6ea544ca7cd5a4773b29e4cd8
Cr-Commit-Position: refs/heads/master@{#308418}