[llvm] [clang] Support VFE in thinLTO (PR #69735)

[Teresa Johnson via cfe-commits]

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@@ -775,6 +783,58 @@ static void computeVariableSummary(ModuleSummaryIndex &Index,
   Index.addGlobalValueSummary(V, std::move(GVarSummary));
 }
 
+static void ComputeDependencies(
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teresajohnson wrote:

nit: function should be lowerCamelCase

https://github.com/llvm/llvm-project/pull/69735