[llvm] [llvm] Lower latency bonus threshold in function specialization. (PR #143954)

[Alexandros Lamprineas via llvm-commits]

labrinea wrote:

Thanks for the data @nikic. Alright, so it seems 0% latency threshold does have a significant effect on compilation times for LTO configurations. @vzakhari this suggests that it serves a purpose, let's not remove it entirely. I will approve this patch now.

https://github.com/llvm/llvm-project/pull/143954