[clang] fixed clang frontend crash with friend class declaration and overload == (PR #133878)

[via cfe-commits]

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@@ -355,6 +355,7 @@ Bug Fixes to Attribute Support
 Bug Fixes to C++ Support
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
+- Clang Now supports Implicitly-Defined Comparison Operators for Friend-Declarations
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cor3ntin wrote:

```suggestion
- Clang now supports implicitly defined comparison operators for friend declarations. (#GH132249)
```

https://github.com/llvm/llvm-project/pull/133878