Please repack the distribution file for Linux compatibility

Hi,

I usually work with Linux. I found the package http://cdn.cocos2d-x.org/cocos2d-x-2.2.1.zip cannot be unpacked with 7z or unzip under Linux.

Even though the final unpacked files seem to be correct, but there are many warnings during the unpacking process, and the exit code of the unpacking program is 1 which cause some problem to my build script. Ignoring this error code is not a nice way to handle this issue.

Thanks,
D.