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

[Andrew Rogers via llvm-commits]

andrurogerz wrote:

>  I think so it depends on if @andrurogerz needs it for his work on annotating exports as well.

I had to make these same patches locally to build the test against an LLVM DLL, so this PR is still relevant. If you're willing/able to merge it that'd be wonderful.


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