[lld] [lld][ELF] Introduce an option to keep data section prefix. (PR #148985)

[Mingming Liu via llvm-commits]

https://github.com/mingmingl-llvm commented:

> The description should be updated to describe the .rodata.cstN.hot special case. Ideally just list the literal mapping rules

This makes sense. Done in PR description and code comment. Please take another look, thanks!

https://github.com/llvm/llvm-project/pull/148985