[llvm] [Object] Beginnings of SFrame parser and dumper (PR #147294)

[James Henderson via llvm-commits]

jh7370 wrote:

> Thanks for the review. I'm going to do a rebase force-push now that the dependent PR has been merged. I apologise if that loses some the comments. I believe I have addressed all of them. I'll do subsequent updates via merges.

No problem, thanks. Will respond inline to a couple of things now, but will do a proper review tomorrow (I've used up as much time as I have for LLVM reviewing today).

https://github.com/llvm/llvm-project/pull/147294