Use a whitelist for depot_tools pylint instead

R=maruel@chromium.org
BUG=644995

Review-Url: https://codereview.chromium.org/2353393004
diff --git a/cpplint.py b/cpplint.py
index f74eff7..6d23859 100755
--- a/cpplint.py
+++ b/cpplint.py
@@ -28,6 +28,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# pylint: skip-file
+
 """Does google-lint on c++ files.
 
 The goal of this script is to identify places in the code that *may*