[llvm] [TTI] Treat `*l` (long double) and `*f128` (_Float128) libcalls the same (PR #148311)

[Nikita Popov via llvm-commits]

nikic wrote:

> > Can this be tested?
> 
> I assume there is a test for the current `*l` behavior that could be expanded, but I'm not sure what this would look like - any idea where to look?

Comment the code out, run the tests, and see what fails :)

https://github.com/llvm/llvm-project/pull/148311