oem_preloader: Write security.ima during preloading

Write security.ima xattr on files in OEM partition, if they don't yet
have it.

BUG=b/465211305
TEST=go test ./src/pkg/oempreloader/...
RELEASE_NOTE=Write security.ima during preloading.

Change-Id: I00873d7627fcf9d6592d681a1559d0aecf7cee90
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/152483
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Cloud-Build: 228075978874@cloudbuild.gserviceaccount.com <228075978874@cloudbuild.gserviceaccount.com>
4 files changed
tree: 562984d9a54f10c9e2c0fea98f9695ed7f6be15a
  1. coverage/
  2. release/
  3. src/
  4. testing/
  5. vendor/
  6. .bazelignore
  7. .gitignore
  8. BUILD.bazel
  9. cloudbuild.yaml
  10. CONTRIBUTING.md
  11. deps.bzl
  12. go.mod
  13. go.sum
  14. LICENSE
  15. postsubmit-cloudbuild.yaml
  16. README.md
  17. run_builds.sh
  18. run_unit_tests.sh
  19. WORKSPACE
README.md

Tools for Container-Optimized OS

This is a repository of various tools developed for Container-Optimized OS. Examples include cos-gpu-installer, cos-toolbox, etc.

See CONTRIBUTING.md for how to contribute.