[llvm] [Offload] Skip test on big endian host (PR #206405)

[Rainer Orth via llvm-commits]

rorth wrote:

AFAICS the `Clang::clang-offload-bundler-magic-collision.c` test has the same issue, as reported in PR #205587, however I don't see an equivalent to `host-byteorder-little-endian` in the `clang` testsuite.

https://github.com/llvm/llvm-project/pull/206405