Initrd fixlayers .desktop multiple Exec lines

The problem reported by FeodorF and solution found by Caramel:

https://forum.puppylinux.com/viewtopic.php?p=149322#p149322

I implemented the fix, testing for all "Exec=..." lines in the .desktop file:

https://github.com/bkauler/woofq/commit/389407b7a782a60d5f5a3d15952d7ee6c3bd994d   

Tags: easy