LAKITU: Make doc generation for perf non-fatal

There is a known race in doc generation (http://crbug/1182728#c27,
b/227337133). perf is reliably hitting this race in sdk builds,
which is causing the builds to fail. Let's fix it by making doc
generation non-fatal.

BUG=b/177367546
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I816cddcdbcb12affb96902b58adcfe8116093201
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/32606
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
Reviewed-by: Rayan Dasoriya <dasoriya@google.com>
2 files changed