make: add coverage target by egernst · Pull Request #685 · apple/container

To facilitate ability to gather code coverage metrics without slowing down our integration target, let's add a coverage target.

From this we can run xcrun llvm-profdata merge to get profdata and gather overall code coverage metrics

Type of Change

  • Bug fix
  • New feature
  • Breaking change
  • Documentation update

Motivation and Context

[Why is this change needed?]

Testing

  • Tested locally
  • Added/updated tests
  • Added/updated docs