整理的ftp库，有源代码和已经编译好的库，分x86和arm版-Finishing ftp libraries, source code and precompiled libraries, points x86 and arm version

通过ftp实现pc与arm之间实时播放MP3和wav文件，需自己下载ftp客户端。-Via ftp to achieve real-time playback of MP3 and wav files between pc and arm, need to download ftp client.