Tolerate missing log directories am: 1df901d6db

Original change: https://android-review.googlesource.com/c/platform/tools/acloud/+/3389204

Change-Id: Ibee140a6967e0186f6e86b55b4303f1bee8240f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>