[llvm] [RISCV] Set DebugLoc of epilogue (PR #74702)

[Alex Bradbury via llvm-commits]

asb wrote:

I believe these were intentionally removed in https://github.com/llvm/llvm-project/commit/700042cd8890 which in turn references  3e081703c349 by @MatzeB.

You might also be interested in https://reviews.llvm.org/D143248 which sadly got completely stuck as nobody seems to be able to review it.

https://github.com/llvm/llvm-project/pull/74702