[PATCH] use xorriso with -iso-level 3

[Ronny Standtke <ronny.standtke@fhnw.ch>]

For building larger live systems (squashfs > 4G) xorriso must be called
with iso level 3. We have been building our Debian Live based
distribution with this switch for the whole wheezy cycle and did not
notice any problem with it.

Please accept the attached patch to support larger Debian Live systems.

Ronny

diff --git a/scripts/build/binary_iso b/scripts/build/binary_iso
index 7abfc69..080cc65 100755
--- a/scripts/build/binary_iso
+++ b/scripts/build/binary_iso
@@ -80,7 +80,7 @@ then
 fi
 
 # Handle xorriso generic options
-XORRISO_OPTIONS="-R -r -J -joliet-long -l -cache-inodes"
+XORRISO_OPTIONS="-R -r -J -joliet-long -l -cache-inodes -iso-level 3"
 
 # Handle xorriso live-build specific options
 if [ "${LIVE_IMAGE_TYPE}" = "iso-hybrid" ]