[clang] [llvm] [SystemZ] Add support for __builtin_setjmp and __builtin_longjmp (PR #116642)

[Paul Kirth via cfe-commits]

ilovepi wrote:

This seems to have broken build bot and Fuchsia's Linux CI https://ci.chromium.org/ui/p/fuchsia/builders/toolchain.ci/clang-host-linux-x64/b8729261510660874657/overview. Would you mind reverting until a fix is ready?

https://github.com/llvm/llvm-project/pull/116642