Fix arduino sdk path finding issue

Author: taoyuan

cmake/Platform/Other/FindArduinoSDK.cmake

@@ -19,6 +19,11 @@ function(find_arduino_sdk _return_var)
             NO_CMAKE_FIND_ROOT_PATH)
     get_filename_component(sdk_path "${arduino_program_path}" DIRECTORY)
 
+    if (${CMAKE_HOST_APPLE})
+        get_filename_component(sdk_path "${sdk_path}" DIRECTORY)
+        string(APPEND sdk_path "/Java")
+    endif()
+
     if (NOT sdk_path OR "${sdk_path}" MATCHES "NOTFOUND")
         string(CONCAT error_message
                 "Couldn't find Arduino SDK path - Is it in a non-standard location?" "\n"