fix GameState.getGameStatePath()

对于原函数中，写固定了 "/" 分隔符，在 x player 跑的时候遇到问题，而 device.directorySeparator 获取到却是 "\" ，那么调用本函数会导致返回的文件路径不存在，也就失败。
现在改为 device.directorySeparator 来获取，目前对于本人当前问题已经解决。
fix CCSchedulerScriptHandle not init member field
fix compatibility
Merge pull request #1 from allanpk716/patch-1

fix GameState.getGameStatePath()
fix compatibility
fix compatibility
Merge branch 'develop' of https://github.com/dualface/quick-cocos2d-x into develop
bugfix: missing setSearchRootPath