[clang] [llvm] [RISCV] Add Zicfiss support to the shadow call stack implementation. (PR #68075)

[Paul Kirth via cfe-commits]

https://github.com/ilovepi commented:

I think this is basically good IMO once we settle on the default values. You should still get approval from one of the RISCV code owners before landing though.

https://github.com/llvm/llvm-project/pull/68075