[llvm] [AMDGPU] Emit AMDHSA kernel descriptors to `.amdhsa.kd` section (PR #122930)

[Ben Vanik via llvm-commits]

benvanik wrote:

Darn, understandable. Dummy relocations or GNU_RETAIN sound reasonable and I'm sure would help me out. My workaround today is either to patch one of the changes in or glob all my files together into a single compilation unit so I don't need LTO - anything is better than that :)

https://github.com/llvm/llvm-project/pull/122930