[llvm] [Support] Simplify Object::operator== (NFC) (PR #157311)

[Kazu Hirata via llvm-commits]

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@@ -153,6 +153,8 @@ class Object {
   LLVM_ABI json::Object *getObject(StringRef K);
   LLVM_ABI const json::Array *getArray(StringRef K) const;
   LLVM_ABI json::Array *getArray(StringRef K);
+
+  friend bool operator==(const Object &LHS, const Object &RHS);
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kazutakahirata wrote:

@kuhar No, not quite.  `operator==` requires complete types on `llvm::json::ObjectKey` and `llvm::json::Value`, both of which are still incomplete as of the `operator==` definition site in the header file.

https://github.com/llvm/llvm-project/pull/157311