[llvm] [DLCov 3/5] Implement DebugLoc origin-tracking (PR #107369)

[J. Ryan Stinnett via llvm-commits]

jryans wrote:

Should these older PRs be closed? It seems like they've been replaced by a new starting with https://github.com/llvm/llvm-project/pull/143590.

https://github.com/llvm/llvm-project/pull/107369