add tests-boot-js-for-obfuscation.js as an entry

After obfuscation, all js files will be combined to one "game.js".
So all "require" keywords should be removed, otherwise the errors "can not find xxx.js" will raise.
Merge pull request #140 from walzer/jsb-obfuscation

add tests-boot-js-for-obfuscation.js as an entry