fix: explicitly cache C++ AR/RANLIB definitions

Author: tayne3

zig-toolchain.cmake

@@ -191,9 +191,9 @@ _zig_write_script("zig-strip"   "strip"   FALSE FALSE)
 set(CMAKE_C_COMPILER          "${_zig_shims_dir}/zig-cc${_zig_wrapper_ext}")
 set(CMAKE_CXX_COMPILER        "${_zig_shims_dir}/zig-c++${_zig_wrapper_ext}")
 set(CMAKE_AR                  "${_zig_shims_dir}/zig-ar${_zig_wrapper_ext}"      CACHE FILEPATH "Archiver"          FORCE)
-set(CMAKE_CXX_COMPILER_AR     "${CMAKE_AR}")
+set(CMAKE_CXX_COMPILER_AR     "${CMAKE_AR}"                                      CACHE FILEPATH "CXX Archiver"      FORCE)
 set(CMAKE_RANLIB              "${_zig_shims_dir}/zig-ranlib${_zig_wrapper_ext}"  CACHE FILEPATH "Ranlib"            FORCE)
-set(CMAKE_CXX_COMPILER_RANLIB "${CMAKE_RANLIB}")
+set(CMAKE_CXX_COMPILER_RANLIB "${CMAKE_RANLIB}"                                  CACHE FILEPATH "CXX Ranlib"        FORCE)
 set(CMAKE_NM                  "${_zig_shims_dir}/zig-nm${_zig_wrapper_ext}"      CACHE FILEPATH "NM"                FORCE)
 set(CMAKE_OBJCOPY             "${_zig_shims_dir}/zig-objcopy${_zig_wrapper_ext}" CACHE FILEPATH "Objcopy"           FORCE)
 set(CMAKE_STRIP               "${_zig_shims_dir}/zig-strip${_zig_wrapper_ext}"   CACHE FILEPATH "Strip"             FORCE)