Clean up DOS line endings and trailing white space.

This is a simple clean up that should have no functional code changes. It gets rid of the DOS line endings and trailing white space.

My biggest reason to do this is that someone did this to the RetroArch repo and this made the diff output between this repo and libretro-common far less than useful. So I think there is no good reason to not apply this clean up here too. :)

This was done with these two commands.

find src/ -type f -exec sed -i 's/\r$//' {} \;
find src/ -type f -exec sed -i 's/[ \t]*$//' {} \;

rtissera / libchdr

Clean up DOS line endings and trailing white space. #2