[lld] [llvm] [WebAssembly] Require tags for Wasm EH and Wasm SJLJ to be defined externally (PR #159143)

[Heejin Ahn via llvm-commits]

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@@ -249,13 +249,6 @@ MCSymbol *WebAssemblyAsmPrinter::getOrCreateWasmSymbol(StringRef Name) {
   SmallVector<wasm::ValType, 4> Params;
   if (Name == "__cpp_exception" || Name == "__c_longjmp") {
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aheejin wrote:

Not sure if meant this, but our asm parser sets the tag type when parsing `.tagtype`:
https://github.com/llvm/llvm-project/blob/fdb1f486387d46bd046d7827fcd19fa44118bffe/llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp#L1096

https://github.com/llvm/llvm-project/pull/159143