Enable simplestream plugin in CMakeLists (#1121)

Author: Dygear

CMakeLists.txt

@@ -374,7 +374,7 @@ add_subdirectory(plugins/openmhz_uploader)
 add_subdirectory(plugins/broadcastify_uploader)
 add_subdirectory(plugins/unit_script)
 add_subdirectory(plugins/rdioscanner_uploader)
-#add_subdirectory(plugins/simplestream)
+add_subdirectory(plugins/simplestream)
 
 # Add user plugins located in /user_plugins
 # Matching: /user_plugins/${plugin_dir}/CMakeLists.txt