[lld] [llvm] [lld][WebAssembly] Report undefined symbols in -shared/-pie builds (PR #75242)

[Derek Schuff via llvm-commits]

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@@ -323,6 +330,12 @@ class DefinedData : public DataSymbol {
   uint64_t size = 0;
 };
 
+class SharedData : public DataSymbol {
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dschuff wrote:

Should this class be called `SharedDataSymbol` for consistency with functions and with the base class?

https://github.com/llvm/llvm-project/pull/75242