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

[Joseph Huber via llvm-commits]

jhuber6 wrote:

The call to `hsa_executable_get_symbol_by_name` works just fine it seems, but there's some unknown problem when actually *running* the image. Will need to figure out why.

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