[clang] [llvm] [MC,clang,llvm-readobj,yaml2obj] Support CREL relocation format (PR #91280)

[David Blaikie via cfe-commits]

dwblaikie wrote:

Oh, and I take it there's no /official/ extension space in the SHT_* space? The intent is to standardize it where it lies? (like use 20 for the shipped version? Or eventually get some lower designation?) I understand tnhe hesitance to use "SHT_LLVM" or the like (though equally, it does seem suitable (to try to use a name less likely to collide), if this is an experiment ,but I understand other projects may have some not-invented-here negative sentiment to such a thing), perhaps "SHT_EXP" wouldn't be too bad?

https://github.com/llvm/llvm-project/pull/91280