[compiler-rt] [llvm] [XRay] Add `__xray_default_options` to specify build-time defined options (PR #117921)

[Chris Apple via llvm-commits]

https://github.com/cjappl approved this pull request.

LGTM - much cleaner than the first go, thanks for revising

https://github.com/llvm/llvm-project/pull/117921