Augment f571794 to only complain for some files.

Summary:
Some of the files we have *expect* a console.log, such as our deploy
scripts (where console.log is how we write to stderr at deploy-time).
The test files can also have them.  Add these exceptions to
runlint.py.

Test Plan:
% ~/khan/khan-linter/runlint.py deploy/compile_handlebars_js_templates.js
<nothing>

% ~/khan/khan-linter/runlint.py javascript/shared-package/console.js
/home/csilvers/khan/webapp/javascript/shared-package/console.js:48:E0132 Illegal reference to console.log - Leftover debug code?

Both of these gave errors before this change, now only the second does.

Reviewers: benkomalo

Reviewed By: benkomalo

Differential Revision: http://phabricator.khanacademy.org/D2188