closed #4559: Wrong behavior of multi-touch on iphone5s/ipadAir (arm64 arch)
Warning fixes in SocketIOTest.cpp/ FileUtilsTest.cpp.
Merge pull request #5989 from dumganhar/iss4559-ios-64bit

closed #4559: Wrong behavior of multi-touch on iphone5s/ipadAir (arm64 arch)
Mac build fix after merging https://github.com/cocos2d/cocos2d-x/pull/5989
Merge pull request #5991 from dumganhar/develop

Mac build fix after merging https://github.com/cocos2d/cocos2d-x/pull/5989
issue #4401, fix a typo
Merge pull request #5992 from andyque/fix_typo

issue #4401, fix a typo