Some fixes for android-build.py.
Merge pull request #5787 from dumganhar/develop

Some fixes for android-build.py.
make description more readable
update readme
update readme and releae note
Merge pull request #5789 from minggo/develop

update some docs
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop_new_fix