Introduce a bit of sanity to talk/PRESUBMIT.py's license checking.

The comma this allows is a very common variant of the license header (3:1
preferred over the no-comma variant in talk/).

Also pacify pylint a bit, and correct a flagrantly incorrect header I happened
to come across.

BUG=2098,2133
R=henrike@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1866004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4396 4adac7df-926f-26a2-2b94-8c16560cd09d

PRESUBMIT.py

@@ -97,6 +97,8 @@ def _CommonChecks(input_api, output_api):
   results.extend(input_api.canned_checks.RunPylint(input_api, output_api,
       black_list=(r'^.*gviz_api\.py$',
                   r'^.*gaeunit\.py$',
+                  # Embedded shell-script fakes out pylint.
+                  r'^talk/site_scons/site_tools/talk_linux.py$',
                   r'^third_party/.*\.py$',
                   r'^testing/.*\.py$',
                   r'^tools/gyp/.*\.py$',