Update .gitignore for Xcode 5.
Update .gitignore for Xcode 5.

mleasyZhuZhiqiang/KSCrash,mindsnacks/KSCrash,mleasyZhuZhiqiang/KSCrash,mindsnacks/KSCrash,mindsnacks/KSCrash,mindsnacks/KSCrash,mleasyZhuZhiqiang/KSCrash