Cant't find libgame.so on cocos2d-x 2.2.1

Hi guys. i tried using the create_project.py that was on tools folder inside cocos2dx folder to generate projects for different platform, and so i tried to build the android project by first editing the build_native.sh and adding the ndk root there, and run it on the terminal, but after building it, i found out that it doesn’t generate libgame.so, anyone knows how to fix it? Any help is appreciated…