add jar generate in swig mode

[ririyeye]

在使用swig生成java文件的场景下，添加javac和jar打包文件 这样可以直接使用jar包

使用方法如下 添加buildjar = true参数

- add_rules("swig.c", {moduletype = "java"})
+ add_rules("swig.c", {moduletype = "java" , buildjar = true})

[waruqi]

最近有点忙，等后两天我看下

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

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I've been a little busy lately. I'll check it out in the next two days.

[waruqi]

thanks