Better Architecture detection strategy if compiling on Apple Silicon

Tools/CMake/torque3d.cmake

@@ -745,14 +745,13 @@ if (APPLE AND NOT IOS)
     set(ARCHITECTURE_STRING_APPLE "x86_64;arm64")
     set(DEPLOYMENT_TARGET_APPLE "10.13")
   else()
-    check_c_compiler_flag("-arch arm64" armSupportedApple)
-    if(armSupportedApple)
+    if (CMAKE_SYSTEM_PROCESSOR MATCHES "arm64")
       set(ARCHITECTURE_STRING_APPLE "arm64")
       set(DEPLOYMENT_TARGET_APPLE "11.0")
     else()
       set(ARCHITECTURE_STRING_APPLE "x86_64")
       set(DEPLOYMENT_TARGET_APPLE "10.9")
-    endif() 
+    endif()
   endif()
 
   set(CMAKE_OSX_ARCHITECTURES ${ARCHITECTURE_STRING_APPLE} CACHE STRING "OSX Architecture" FORCE)