PRESUBMIT.cfg: Add chunnel to clippy-check.

BUG=None
TEST=repo upload

Change-Id: Id796788b1134d2c720272fe815727a72e771a583
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/3116571
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Allen Webb <allenwebb@google.com>
diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
index 84e9469..24ce896 100644
--- a/PRESUBMIT.cfg
+++ b/PRESUBMIT.cfg
@@ -38,6 +38,7 @@
   --project=libchromeos-rs/
   --project=metrics/memd/
   --project=vm_tools/9s/
+  --project=vm_tools/chunnel/
   --project=resourced/
   --project=sirenia/
   --project=system_api/