[WebAssembly] change WasmExportEntry.Symbol to WasmExportEntry.Sym

[inglorion]

Summary

This stops gcc complaining that the declaration changes the meaning of
'Symbol' from 'class lld::wasm::Symbol'.

[sbc100]

Thanks! I made the exact same change in rL322921

[inglorion]

No longer needed now that rL322921 is in.

[inglorion]

Thanks for the fix, sbc100!

lld/wasm/Writer.cpp

struct WasmSignatureDenseMapInfo {
   }
   static bool isEqual(const WasmSignature &LHS, const WasmSignature &RHS) {
     return LHS == RHS;
   }
 };
 
 // A Wasm export to be written into the export section.
 struct WasmExportEntry {
-  const Symbol *Symbol;
+  const Symbol *Sym;
   StringRef FieldName; // may not match the Symbol name
 };
 
 // The writer writes a SymbolTable result to a file.
 class Writer {
 public:
   void run();
 
if (ExportMemory) {
     WasmExport MemoryExport;
     MemoryExport.Name = "memory";
     MemoryExport.Kind = WASM_EXTERNAL_MEMORY;
     MemoryExport.Index = 0;
     writeExport(OS, MemoryExport);
   }
 
   for (const WasmExportEntry &E : ExportedSymbols) {
-    DEBUG(dbgs() << "Export: " << E.Symbol->getName() << "\n");
+    DEBUG(dbgs() << "Export: " << E.Sym->getName() << "\n");
     WasmExport Export;
     Export.Name = E.FieldName;
-    Export.Index = E.Symbol->getOutputIndex();
-    if (E.Symbol->isFunction())
+    Export.Index = E.Sym->getOutputIndex();
+    if (E.Sym->isFunction())
       Export.Kind = WASM_EXTERNAL_FUNCTION;
     else
       Export.Kind = WASM_EXTERNAL_GLOBAL;
     writeExport(OS, Export);
   }
 }
 
 void Writer::createStartSection() {}
void Writer::createLinkingSection() {
   DataSizeSubSection.writeToStream(OS);
 
   if (!Config->Relocatable)
     return;
 
   std::vector<std::pair<StringRef, uint32_t>> SymbolInfo;
   for (const WasmExportEntry &E : ExportedSymbols) {
     uint32_t Flags =
-        (E.Symbol->isLocal() ? WASM_SYMBOL_BINDING_LOCAL :
-         E.Symbol->isWeak() ? WASM_SYMBOL_BINDING_WEAK : 0) |
-        (E.Symbol->isHidden() ? WASM_SYMBOL_VISIBILITY_HIDDEN : 0);
+        (E.Sym->isLocal() ? WASM_SYMBOL_BINDING_LOCAL :
+         E.Sym->isWeak() ? WASM_SYMBOL_BINDING_WEAK : 0) |
+        (E.Sym->isHidden() ? WASM_SYMBOL_VISIBILITY_HIDDEN : 0);
     if (Flags)
       SymbolInfo.emplace_back(E.FieldName, Flags);
   }
   if (!SymbolInfo.empty()) {
     SubSection SubSection(WASM_SYMBOL_INFO);
     writeUleb128(SubSection.getStream(), SymbolInfo.size(), "num sym info");
     for (auto Pair: SymbolInfo) {
       writeStr(SubSection.getStream(), Pair.first, "sym name");