[llvm] [RemoveDIs][NFC] Introduce DbgRecord base class [1/3] (PR #78252)

[Stephen Tozer via llvm-commits]

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@@ -44,6 +44,7 @@ class Module;
 class ModuleSlotTracker;
 class raw_ostream;
 class DPValue;
+class DbgRecord;
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SLTozer wrote:

Unused forward decl?

https://github.com/llvm/llvm-project/pull/78252