[clang] [llvm] [mlir] [OpenMP] Use ext linkage for kernels handles and globals handles keep… (PR #200964)

[Joseph Huber via cfe-commits]

https://github.com/jhuber6 commented:

Honestly, I don't really remember why these are weak. I think that was just inherited from the existing code like some kind of weird ODR that wasn't actually enforced.

https://github.com/llvm/llvm-project/pull/200964