[llvm] [JITLink][RISCV] Implement eh_frame handling (PR #68253)

[Job Noorman via llvm-commits]

mtvec wrote:

> @mtvec I took your range check and the tests from #66067 and added you as co-author. Let me know if this is fine for you, I'm not sure LLVM has guidelines how to handle this kind of case where two contributors independently came up with roughly the same change...

I'm also not sure if there are any guidelines but for me this is definitely fine. Thanks!

https://github.com/llvm/llvm-project/pull/68253