[llvm] [DLCov 1/5] Add CMake option to enable enhanced line number coverage tracking (PR #107278)

[J. Ryan Stinnett via llvm-commits]

================
@@ -524,6 +524,10 @@ endif()
 
 option(LLVM_ENABLE_CRASH_DUMPS "Turn on memory dumps on crashes. Currently only implemented on Windows." OFF)
 
+set(LLVM_ENABLE_DEBUGLOC_COVERAGE_TRACKING "DISABLED" CACHE STRING
+  "Enhance debugify's line number coverage tracking; enabling this is abi-breaking. Can be DISABLED, COVERAGE, or COVERAGE_AND_ORIGIN.")
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jryans wrote:

```suggestion
  "Enhance Debugify's line number coverage tracking; enabling this is ABI-breaking. Can be DISABLED, COVERAGE, or COVERAGE_AND_ORIGIN.")
```

https://github.com/llvm/llvm-project/pull/107278