[llvm] [CMake] Workaround the incompatibility for executable exports (PR #101741)

[Cyndy Ishida via llvm-commits]

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

This only changes exports for `llvm-jitlink` and not any of the other toolchain executables, LGTM! Thank you Steven!

https://github.com/llvm/llvm-project/pull/101741