erpt: implement forced shutdown detection

libraries/libstratosphere/source/erpt/srv/erpt_srv_stream.hpp

@@ -27,6 +27,7 @@ namespace ams::erpt::srv {
     class Stream {
         private:
             static bool s_can_access_fs;
+            static os::SdkMutex s_fs_commit_mutex;
         private:
             u32 buffer_size;
             u32 file_position;