[BUG] Build fails with `-cover` / `-covermode atomic`

[RomainMuller]

Version of orchestrion

v0.7.x

Describe what happened:

When building with -cover / -covermode=atomic (possibly also with other cover modes), the link stage fails with a fingerprint mismatch.

This is because the build ID addendum does not get properly tainted with cache flags. But once this is fixed, the compilation fails on coverage-instrumented files because all imports appear to be removed from them.