修改java版本

我修改了一下 java 版本的 LAC， 并将代码上传到了 https://github.com/zhouzusheng/lac
* 代码 包括java 与 jni
* 编译好的dll so 也放到压缩文件上传了

Start by reviewing the Java and JNI implementation in the linked repository, https://github.com/zhouzusheng/lac, and compare it with this project. The issue mentions compiled DLL and SO files but names no source files or tests. Done would require a clear decision about whether and how this external Java version should be incorporated into baidu/lac.

Written by the indexing model from the issue text.