[clang] [clang][DependencyScanning] Track dependencies from prebuilt modules to determine IsInStableDir (PR #132237)

[Jan Svoboda via cfe-commits]

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@@ -2616,6 +2616,18 @@ bool ASTReader::shouldDisableValidationForFile(
   return false;
 }
 
+namespace {
+
+std::pair<StringRef, StringRef>
+getUnresolvedInputFilenames(const ASTReader::RecordData &Record,
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jansvoboda11 wrote:

Nit: Per [LLVM Coding Standards](https://llvm.org/docs/CodingStandards.html#id59), this should be `static` instead of wrapped inside an anonymous namespace:
> make anonymous namespaces as small as possible, and only use them for class declarations

https://github.com/llvm/llvm-project/pull/132237