Disable symbol versions for clang-cpp also with MSVC

It seems we can get there with MSVC if LLVM_BUILD_LLVM_DYLIB_VIS is set.
Slightly surprising because I didn't know that MSVC supports the flag
-Bsymbolic-functions, but let's play it safe.

Author: aaronpuchert

clang/tools/clang-shlib/CMakeLists.txt

@@ -51,7 +51,7 @@ add_clang_library(clang-cpp
 
 configure_file(simple_version_script.map.in simple_version_script.map)
 
-if (NOT APPLE AND NOT MINGW AND NOT LLVM_LINKER_IS_SOLARISLD)
+if (NOT APPLE AND NOT MSVC AND NOT MINGW AND NOT LLVM_LINKER_IS_SOLARISLD)
   # Solaris ld does not accept global: *; so there is no way to version *all* global symbols
   target_link_options(clang-cpp PRIVATE LINKER:--version-script,${CMAKE_CURRENT_BINARY_DIR}/simple_version_script.map)
 endif()