Add PRESUBMIT.cfg file to the repo.

BUG=None
TEST=This CL is proof.

Change-Id: I83ef482e01ddc181b4b7f9651f795297c8863005
Reviewed-on: https://chromium-review.googlesource.com/203762
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Lee Campbell <leecam@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Commit-Queue: Jorge Lucangeli Obes <jorgelo@chromium.org>
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
new file mode 100644
index 0000000..17f9b03
--- /dev/null
+++ b/PRESUBMIT.cfg
@@ -0,0 +1,4 @@
+[Hook Overrides]
+
+# We are using Linux-style indentation with tabs
+tab_check: false