[llvm] [llvm-c] Add LLVMDWARFTypeEncoding enum and update the MacInfo and callconv enum (PR #84456)

[via llvm-commits]

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@@ -186,7 +186,30 @@ typedef unsigned LLVMMetadataKind;
 
 /**
  * An LLVM DWARF type encoding.
+ * @note Values are from DW_ATE_* constants in the DWARF specification.
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edg-l wrote:

I don't think we don't, also this enum isn't there.

https://github.com/llvm/llvm-project/pull/84456