[llvm] [offload] Fix finding amdgpu/nvptx-arch to generate tests (PR #135072)

[Joel E. Denny via llvm-commits]

jdenny-ornl wrote:

For me, before PR #134713, it took the `if(TARGET amdgpu-arch)` instead of the `else`.

Now in the `else`, "bin" is included in  `${LLVM_TOOLS_BINARY_DIR}`, so it was looking in `bin/bin`.  I didn't check whether `bin` was included before PR #134713. I assume it was but it didn't take the `else` so it didn't matter.



https://github.com/llvm/llvm-project/pull/135072