[clang] [llvm] Add __attribute__((visibility("default"))) attribute to certain symbols to stop them being hidden when linking clangInterpreter library to other libraries during Emscripten build (PR #146786)

[via llvm-commits]

mcbarton wrote:

I have no idea how what I did caused the Flang test to fail.

https://github.com/llvm/llvm-project/pull/146786