[llvm] [CMake] Support per-target linker flags (PR #68393)

[Vincent Lee via llvm-commits]

thevinster wrote:

Hmm, you're right. It isn't providing any use here. I had originally thought of having it so we can could write specific logic against targets that have been added with custom flags, but I realize that might not be a real use case after all. 

https://github.com/llvm/llvm-project/pull/68393