Roll tools/swarming_client/ to 9755ed3846884c8ba999a4cc1789e49147659635.

Roll tools/swarming_client/ to 9755ed3846884c8ba999a4cc1789e49147659635.

$ git log 6b555c18f..9755ed384 --date=short --format='%ad %ae %s' | sed 's/@chromium\.org//'
2014-08-01 maruel Add a small script to be used as framework to generate load tests on GCE VMs
2014-07-31 maruel Fix breakage in 142681d6. The server currently require a int, not a float.
2014-07-31 maruel Fix swarming.py query due to 312f465bb63 on the server side.
2014-07-31 maruel Use a const for the differential in the timeout.
2014-07-30 maruel Fix swarming_load_test_bot.py and swarming_load_test_client.py.
2014-07-30 maruel Make it easier to use multiple bot processes on a single host.
2014-07-29 maruel Fix swarming_load_test_bot.py.

R=csharp@chromium.org
BUG=

Review URL: https://codereview.chromium.org/434123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287096 0039d316-1c4b-4281-b951-d872f2087c98