[llvm] [SPIRV] Emit LinkageType for function with hidden visibility (PR #164374)

[Juan Manuel Martinez Caamaño via llvm-commits]

jmmartinez wrote:

I think that there is a change to reduce the scope of the change, to only certain well known functions. My first proposal is to match the translator's behavior.

https://github.com/llvm/llvm-project/pull/164374