Roll tools/swarming_client/ to c44f5725d2243ada2d8b63adf85ca76acb50fee6.

Roll tools/swarming_client/ to c44f5725d2243ada2d8b63adf85ca76acb50fee6.

$ git log 119b0841b..c44f5725d --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2015-01-08 maruel Add signal handling to subprocess42 and make run_isolated use it.

R=vadimsh@chromium.org
BUG=

Committed: https://crrev.com/2a249e16e7dd16084ccbd5dd5549ed9b29be0961
Cr-Commit-Position: refs/heads/master@{#310695}

[Vadim Sh., 2015-01-09 02:00:28]

lgtm

[M-A Ruel, 2015-01-09 02:02:11]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-01-09 02:04:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/840043005/1

[commit-bot: I haz the power, 2015-01-09 03:17:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-09 03:19:28]

Patchset 1 (id:??) landed as
https://crrev.com/2a249e16e7dd16084ccbd5dd5549ed9b29be0961
Cr-Commit-Position: refs/heads/master@{#310695}