[llvm] [LLVM-C][OCaml] Update OCaml bindings to match LLVMMetadataKind in C API (PR #132268)

[Nikita Popov via llvm-commits]

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@@ -196,6 +195,7 @@ enum {
   LLVMDIGenericSubrangeMetadataKind,
   LLVMDIArgListMetadataKind,
   LLVMDIAssignIDMetadataKind,
+  LLVMDISubrangeTypeMetadataKind,
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nikic wrote:

Maybe add a comment above this enum that new entries should always be appended instead of matching the order in Metadata.def?

https://github.com/llvm/llvm-project/pull/132268