[clang] [llvm] [WebAssembly] Use Single as the default Triple thread model (PR #223917)

[Matt Arsenault via cfe-commits]

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@@ -197,7 +197,15 @@ static bool coalesceFeaturesAndStripAtomics(Module &M,
   else if (StrippedTLS && !StrippedAtomics)
     stripAtomics(M);
 
-  recordFeatures(M, ST, Features, StrippedAtomics || StrippedTLS);
+  bool Stripped = StrippedAtomics || StrippedTLS;
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arsenm wrote:

Missing test 

https://github.com/llvm/llvm-project/pull/223917