[clang] [CIR] Update CIR unary operations (PR #201727)

[Erich Keane via cfe-commits]

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@@ -224,6 +224,10 @@ class CIRBaseBuilderTy : public mlir::OpBuilder {
     return cir::ComplexImagOp::create(*this, loc, resultType, operand);
   }
 
+  mlir::Value createComplexConj(mlir::Location loc, mlir::Value operand) {
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erichkeane wrote:

It would be nice to have a comment explaining what this does above it?  `Complex` means `the complex types` and `Conj` is... `Conjunction`?   So its not the `Conj` that is complex, it is a `Conj` on `Complex` types? 

https://github.com/llvm/llvm-project/pull/201727