empty column to display as '--'

instead of modify the csv file, which I am parsing in some other scripts (and loading on Google spreadsheets), lets change them only when piping to `column` which has the bug https://man7.org/linux/man-pages/man1/column.1.html#BUGS

Bug: 283139160
Test: `./incremental_build.sh -c "no change" -b soong prod -- nothing`
Change-Id: I4c7a3c3670082e6cc11adf3d123c0ad824a4cb58
3 files changed
tree: 5c51ff509b21c330ee3925b301a11fd3684abca2
  1. api_surfaces/
  2. bin/
  3. ci/
  4. compliance/
  5. docs/
  6. examples/
  7. flags/
  8. json_module_graph/
  9. mk2rbc/
  10. mkcompare/
  11. platforms/
  12. product_config/
  13. product_variables/
  14. rules/
  15. scripts/
  16. tests/
  17. utils/
  18. vendor/
  19. .gitignore
  20. bazel.BUILD
  21. bazel.WORKSPACE
  22. buildifier_hook.sh
  23. common.bazelrc
  24. constants_exported_to_soong.bzl
  25. darwin.bazelrc
  26. linux.bazelrc
  27. OWNERS
  28. PREUPLOAD.cfg
  29. README.md
README.md

Bazel

The code in this directory is experimental. Bazel support for Android Platform is undergoing active development and workflow stability is currently not guaranteed.