[clang] [CIR] Upstream support for emitting constructors (PR #143639)

[Erich Keane via cfe-commits]

================
@@ -37,6 +37,10 @@ class CIRGenCXXABI {
 
   void setCXXABIThisValue(CIRGenFunction &cgf, mlir::Value thisPtr);
 
+  /// Emit a single constructor/destructor with the gien type from a C++
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erichkeane wrote:

```suggestion
  /// Emit a single constructor/destructor with the gen type from a C++
```

https://github.com/llvm/llvm-project/pull/143639