[lld] [lld][MachO] Tail merge strings (PR #161262)

[Ellis Hoag via llvm-commits]

ellishg wrote:

Thanks for the accept! I think I will guard this behind a flag. One reason is for safety, but it also impacts the layout order which could impact performance. The order of the tail merged strings will effectively be ignored, and I want to think about how I could mitigate that.

https://github.com/llvm/llvm-project/pull/161262