[clang] [flang] [llvm] [Offload] Rename and move 'clang-offload-packager' -> 'llvm-offload-binary' (PR #161438)

[James Henderson via llvm-commits]

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jh7370 wrote:

This belongs in llvm/test/tools/llvm-offload-binary, in common with other llvm tools. I'd then name it `basic.ll` or similar to indicate this test is testing generic behaviour.

https://github.com/llvm/llvm-project/pull/161438