[compiler-rt] [llvm] [openmp] [Runtimes] Default build must use its own output dirs (PR #168266)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> I don't get how `offload-tblgen` is supposed to work in a runtime. Unless compiling to the native platform, it cannot be executed.

Yeah, do you think we should move that to LLVM as a tool and pass in a path to the runtime build? Makes it slightly more annoying.

https://github.com/llvm/llvm-project/pull/168266