[llvm] [DebugInfo] Add DW_TAG_property support to LLVM DebugInfo (PR #215776)

[Augusto Noronha via llvm-commits]

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@@ -7263,6 +7263,20 @@ be used for the structure type.
                      getter: "getFoo", attributes: 7, type: !2)
 ```
 
+##### DIProperty
+
+`DIProperty` nodes represent an entity that is syntactically accessed like a
+data member but whose access is implemented by an accessor. No getter or
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augusto2112 wrote:

No need for "no getter or setter is modeled yet", just say that it models the backing variable of the property.

https://github.com/llvm/llvm-project/pull/215776