tools: Add tool to fix permissions on files
tools: Add tool to fix permissions on files

This commit adds the tool fix-perms.sh, a quick script to fix
permissions on various files after they have been munged around by git
or other file-altering (and especially permission-altering) actions.

tiltfactor/mg-game,tiltfactor/mg-game,tiltfactor/mg-game,tiltfactor/mg-game,tiltfactor/mg-game