[clang] [cmake] Respect CLANG_LINK_CLANG_DYLIB for objlibs (PR #93454)

[Chris B via cfe-commits]

https://github.com/llvm-beanz approved this pull request.

I think dependencies for object libraries are implicitly `INTERAFCE`, but it might be nice to make that explicit. I know CMake complains if you mix and match implicit and explicit specification of linkage types.

Otherwise LGTM.

https://github.com/llvm/llvm-project/pull/93454