Symbols in LLVM/MLIR exported by libtriton.so may alias to the symbol in the other component across two libLLVM in versioning

[chengjunlu]

The symbols of LLVM/MLIR are exported by libtriton.so. These symbols may alias to the other components which uses different LLVM/MLIR infrastructure.

And cause issue like:
llvm/llvm-project#47565

A suggested solution is to strip all the LLVM/MLIR symbol from libtriton.so to isolate the LLVM infrastructure.
https://stackoverflow.com/questions/2222162/how-to-apply-fvisibility-option-to-symbols-in-static-libraries

[Stonepia]

Solved in #1240.

It hides the symbols of the shared libraries for libtriton.so, so that when other object link against libtriton.so, there won't have conflict.

This PR didn't handle the case in MacOS, but there is a possible way to use exported_symbols_lists to export a whitelist symbols as mxnet/CMakeLists.txt. I put here in case anyone needs it.