AUTest fails on the daily_skate release builder.

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** Start Stage AUTest [au] - Sat, 07 May 2016 05:35:29 -0700 (PDT)
** 
** Stage for au hw test suites that requires special pre-processing.
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05:35:29: INFO: Waiting up to forever for delta payloads ...
05:35:29: INFO: RunCommand: site_utils/autoupdate/full_release_test.py --npo --nmo --dump --dump_dir /tmp/cbuildbot-tmp5kLuPk/tmpJEAPTv/autotest/au_control_files --archive_url gs://chromeos-image-archive/daisy_skate-release/R52-8290.0.0 8290.0.0 daisy_skate '--log=debug' in /b/cbuild/internal_master/src/third_party/autotest/files
CRITICAL:root:no test configurations generated, nothing to do

@@@STEP_FAILURE@@@
05:35:34: ERROR: Traceback (most recent call last):
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/generic_stages.py", line 511, in Run
    self.PerformStage()
  File "/b/cbuild/internal_master/chromite/cbuildbot/stages/test_stages.py", line 420, in PerformStage
    self.version, self.upload_url)
  File "/b/cbuild/internal_master/chromite/cbuildbot/commands.py", line 1917, in BuildAUTestTarball
    cros_build_lib.RunCommand(cmd, env=run_env, cwd=cwd)
  File "/b/cbuild/internal_master/chromite/lib/cros_build_lib.py", line 619, in RunCommand
    raise RunCommandError(msg, cmd_result)
RunCommandError: return code: 1; command: site_utils/autoupdate/full_release_test.py --npo --nmo --dump --dump_dir /tmp/cbuildbot-tmp5kLuPk/tmpJEAPTv/autotest/au_control_files --archive_url gs://chromeos-image-archive/daisy_skate-release/R52-8290.0.0 8290.0.0 daisy_skate '--log=debug'
cwd=/b/cbuild/internal_master/src/third_party/autotest/files