Implement `sigsetjmp` and `siglongjmp`

[SchrodingerZhu]

• linux (all parts are under reviews now)
  • x86-64
  • aarch64
  • riscv
  • armv7-a/thumb
• macos
  • x86-64
  • aarch64

[llvmbot]

@llvm/issue-subscribers-libc

Author: Schrodinger ZHU Yifan (SchrodingerZhu)

- linux - [ ] x86-64 - [ ] aarch64 - [ ] riscv - macos - [ ] x86-64 - [ ] aarch64

[AlyElashram]

I can work on this , can you assign it to me please? Or are you gonna break this down into smaller tickets to each OS/architecture combo?

[SchrodingerZhu]

The linux part is already pretty much finished with remaining parts as PRs under review.

Do you want to work out the macos support?

[AlyElashram]

Yeah sure, are there other issues for the macos or should I just link the PR to this issue ?
Also if you can please link the other PRs for Linux that I can reference just in case I miss anything.

[SchrodingerZhu]

Feel free to create sub issues. I should have done so.

[AlyElashram]

Child Issue as I'm not able to create one here : #138407