dll for SDL2

静态链接ffmpeg和libass，但是动态链接sdl2的单文件版本，方便用于游戏制作。

This release is use to store prebuilt files.

No need to download the source code here.

tinypot-x64.zip: x64 binary file.

tinypot-dll-x86.zip: x86 dynamic library, static link ffmpeg and libass, dynamic link SDL2. This can be used as a plugin of SDL2 to play video in the game.