◎위챗 : speedseoul
http://guycole.blogspot.kr/2012/03/yet-another-android-ndk-blog-posting.html
https://thenewcircle.com/s/post/49/using_ndk_to_call_c_code_from_android_apps
http://stackoverflow.com/questions/12626067/no-jni-onload-found-skipping-init-application-shutdown
http://stackoverflow.com/questions/23044815/compiling-c-library-for-android-but-no-symbols-found/23044991#23044991