[llvm] [CMake][OCaml] Make OCaml bindings suitable for out-of-tree install (PR #123478)

[Nikita Popov via llvm-commits]

nikic wrote:

> CMAKE_{STATIC,SHARED}_LIBRARY_SUFFIX reports incorrect suffixes for Mac. Use .so and .a for both Mac and Linux.

What's the incorrect suffix that gets reported? Your change doesn't really make sense to me, as the dylib suffix for MacOs is .dylib, not .so.

https://github.com/llvm/llvm-project/pull/123478