[clang] [llvm] [clang-tools-extra] [Clang] Fix : More Detailed "No expected directives found" (PR #78338)

[Timm Baeder via cfe-commits]

================
@@ -1098,7 +1098,13 @@ void VerifyDiagnosticConsumer::CheckDiagnostics() {
     // Produce an error if no expected-* directives could be found in the
     // source file(s) processed.
     if (Status == HasNoDirectives) {
-      Diags.Report(diag::err_verify_no_directives).setForceEmit();
+      std::string directives;
----------------
tbaederr wrote:

```suggestion
      std::string Directive;
```

https://github.com/llvm/llvm-project/pull/78338