Add cros lint check to platform2 that runs cpplint and pylint.

BUG=None
TEST=Changed main.cc to pass lint checks.

Change-Id: I21c80093a14d305e902969b5358d891232a9f5b1
Reviewed-on: https://chromium-review.googlesource.com/197592
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Chris Sosa <sosa@chromium.org>
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
new file mode 100644
index 0000000..5e25fff
--- /dev/null
+++ b/PRESUBMIT.cfg
@@ -0,0 +1,2 @@
+[Hook Scripts]
+hook0=../../chromite/bin/cros lint ${PRESUBMIT_FILES}