Added changes needed to load binaries generated with TI's C compiler. Credit goes to github user texane.

This is better explained [here](http://www.embeddedrelated.com/showarticle/603.php) in the "Installing the PRU loader" section. This changes were made by [texane](https://github.com/texane) but I'm sending the pull request so that other people can use this loader with binaries generated with TI's C compiler.