Fix pylint presubmit checks

Fix pylint presubmit checks

pylint checks were erronously excluded for PRESUBMIT.py files in
root directory of repos because the regex was getting a './' added.

R=iannucci@chromium.org
TBR=M-A

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=176777

[iannucci, 2013-01-15 03:11:26]

lgtm

[commit-bot: I haz the power, 2013-01-15 03:13:40]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ilevy@chromium.org/11880040/1

[commit-bot: I haz the power, 2013-01-15 03:16:25]

Presubmit check for 11880040-1 failed and returned exit status 1.

Running presubmit commit checks ...
Running pylint on 51 files.
Checking out rietveld...
Running save-description-on-failure.sh
Running push-basic.sh
Running upstream.sh
Running submit-from-new-dir.sh
Running abandon.sh
Running submodule-merge-test.sh
Running upload-local-tracking-branch.sh
Running hooks.sh
Running post-dcommit-hook-test.sh
Running upload-stale.sh
Running patch.sh
Running basic.sh

** Presubmit ERRORS **
Missing LGTM from an OWNER for files in these directories:
    depot_tools

Presubmit checks took 162.6s to calculate.

[commit-bot: I haz the power, 2013-01-15 03:19:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ilevy@chromium.org/11880040/1

[commit-bot: I haz the power, 2013-01-15 03:22:05]

Change committed as 176777