[llvm] [JITLink][AArch32] Add explicit visibility macros to functions needed by unittests (PR #116557)

[Saleem Abdulrasool via llvm-commits]

compnerd wrote:

> Maybe i could, but previous discussions i've had with @compnerd he wanted to avoid proliferation of lots of different symbol visibility macros.

We will need a macro for each shared library that we support. If we add more macros for each library, it would become a huge number and can be overwhelming for other developers not familiar with this.


https://github.com/llvm/llvm-project/pull/116557