llvm-project

6695976d - Reland "[libc] build fix for sigsetjmp (#137047)" (#137214)

Reland "[libc] build fix for sigsetjmp (#137047)" (#137214) Reland `sigsetjmp` patches with build fixes. We wrap every target replying on the epilogue library into conditional checks. --------- Co-authored-by: Petr Hosek <phosek@google.com>