Fix for profile-build failure using gcc on MacOS

Fix for profile-build failure using gcc on MacOS

Fixes https://github.com/official-stockfish/Stockfish/issues/3846 ,
where the profiling SF binary generated by GCC on MacOS would launch
but failed to quit. Tested with gcc-8, gcc9, gcc10, gcc-11.

The problem can be fixed by adding -fvisibility=hidden to the compiler
flags, see for example the following piece of Apple documentation:
https://developer.apple.com/library/archive/documentation/DeveloperTools/Conceptual/CppRuntimeEnv/Articles/SymbolVisibility.html

For instance this now works:
   make -j8 profile-build ARCH=x86-64-avx2 COMP=gcc COMPCXX=g++-11

No functional change