add build iOS runtime and Mac runtime function in build_runtime.py script
Merge branch 'runtime' of https://github.com/chuanweizhang2013/cocos2d-x into runtime
Add check android platform version's function.
Fixed the build_runtime script can't output log when build android runtime.
fixed build runtime script can’t remove iOS and Mac folder when build iOS and Mac runtime
Merge branch 'runtime' of https://github.com/chuanweizhang2013/cocos2d-x into runtime
Merge pull request #6 from HujiangDeia/runtime

Runtime