Fixed location of log file on OS X

The OS X build was accidentally including the username of the person who builds the HearthStats.net Uploader in the path of the log file. That meant it wouldn't log anything unless you built it yourself! The build you published has your username trigun0x2 in the filename for everyone...
![embedded-username](https://f.cloud.github.com/assets/1667484/2480900/bee63fe0-b0cc-11e3-9829-d681cf2bee5f.png)

So I've removed the username from the build, it will now use the correct folder and log properly for everyone.