[clang] Fix some static initialization race-conditions (PR #181367)

[Javier Lopez-Gomez via cfe-commits]

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@@ -113,19 +106,25 @@ void Stmt::PrintStats() {
   unsigned sum = 0;
   llvm::errs() << "\n*** Stmt/Expr Stats:\n";
   for (int i = 0; i != Stmt::lastStmtConstant+1; i++) {
-    if (StmtClassInfo[i].Name == nullptr) continue;
-    sum += StmtClassInfo[i].Counter;
+    StmtClassNameTable &entry =
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jalopezg-git wrote:

```suggestion
    const StmtClassNameTable &entry =
```

https://github.com/llvm/llvm-project/pull/181367