Add upstream patch for desktop-file-validate failure
    
    Build fails with:
    
    + desktop-file-validate
    /builddir/build/BUILDROOT/gnome-boxes-3.7.5-1.fc19.i386//usr/share/applications/gnome-boxes.desktop
    /builddir/build/BUILDROOT/gnome-boxes-3.7.5-1.fc19.i386//usr/share/applications/gnome-boxes.desktop:
    
    error: value "virtual machine;vm;?????? ??????" for locale string list key
    "Keywords[ug]" in group "Desktop Entry" does not have a semicolon (';') as
    trailing character