[llvm] [llvm-c] Add bindings for DbgRecord (PR #166383)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

No problem. I just spotted that I think a few of the variables you added to the test will cause unused variable warnings in release builds. I can't remember that being a requirement but I think some bots run with Werror. I could be making that up, but I can see other assert-only variables in the test have a `(void)MyVar;` so possibly best to follow suit here?

(On the other hand, we could land it and see if any bots complain...)

https://github.com/llvm/llvm-project/pull/166383