[clang] [Clang] Emit stub version of OpenCL Kernel (PR #115821)

[Joseph Huber via cfe-commits]

https://github.com/jhuber6 commented:

So, the kernel metadata has a lot of special codegen associated with it. It seems the approach here is to turn the kernels into thin wrappers that call an outlined function? 

https://github.com/llvm/llvm-project/pull/115821