disable various preupload tests

Since this is an upstream repo, we don't want to enforce certain
license/style checks like we would in a source repo we wrote.

BUG=chromium:712659
TEST=uploading works again

Change-Id: Icd44f6e926b241d9d431d0e18c739754a64fc859
Reviewed-on: https://chromium-review.googlesource.com/538253
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
new file mode 100644
index 0000000..a41b38d
--- /dev/null
+++ b/PRESUBMIT.cfg
@@ -0,0 +1,4 @@
+[Hook Overrides]
+cros_license_check: false
+long_line_check: false
+tab_check: false