Annotate generated lines

The lines above some are credited elsewhere (sensors-detect) so
I feel correct attribution might be helpful
in the future

lib/set_MODULES.sh

@@ -5,14 +5,18 @@ function set_MODULES () {
     source "$SCRIPTDIR/lib/paths.sh"
 
     # Write "/etc/modules"
-    printf "vfio
+    printf "
+# Generated by vfio-setup
+vfio
 vfio_iommu_type1
 vfio_pci ids=$1
 vfio_virqfd
 " >> "$SCRIPTDIR/$MODULES"
 
     # Write "/etc/initramfs-tools/modules"
-    printf "vfio
+    printf "
+# Generated by vfio-setup
+vfio
 vfio_iommu_type1
 vfio_pci
 vfio_virqfd