PRESUBMIT: disable license check

The license for this code is different than the standard Chromium OS
license.

BUG=b:169343201
TEST=repo upload

Change-Id: If2bbc762c5929bcbbe5aa04dff0c6a4654bf46b7
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
new file mode 100644
index 0000000..f2d8f02
--- /dev/null
+++ b/PRESUBMIT.cfg
@@ -0,0 +1,2 @@
+[Hook Overrides]
+cros_license_check: false