[lld] [lld] Add support for .eh_frame_hdr sdata8 (PR #174486)

[Farid Zakaria via llvm-commits]

fzakaria wrote:

For reference https://github.com/llvm/llvm-project/pull/179089 is the revised patch.

@MaskRay  should I close this PR then?

https://github.com/llvm/llvm-project/pull/174486