[lld] [lld][WebAssembly] Always search *.so for -Bdynamic (PR #84288)

[Sam Clegg via llvm-commits]

https://github.com/sbc100 commented:

Seems like a good change.

How about we keep `-Bdynamic` as the default when building with `-shared` and/or `-pie` ?  It seems like in those modes we want to consume shared libraries by default.

Another alternative is that we always prefer shared libraries unless `-static` is passed? then it would be up to the clang driver (or users) to specify `-static` in the presence of both `.so` and `.a` files.

Ideally we would have some flag 

https://github.com/llvm/llvm-project/pull/84288