TT#32751 Update gitignore file

Add files which are added during the build of ISO image

Change-Id: I57cd74879c3244511180828d5101837022760fae

.gitignore

@@ -1,2 +1,10 @@
 *~
 sipwise_*.cfg
+artifacts/
+grml64*.iso
+grml64*.iso.sha1
+templates/boot/grub/grub.cfg
+templates/boot/isolinux/isolinux.cfg
+templates/boot/isolinux/syslinux.cfg
+templates/scripts/includes/netscript/
+templates/scripts/includes/sipwise.gpg