ubinize-image.sh previously used ${var:offset:length} substitutions
which are not valid in standard shell.
Replace the existing parameter matching by a case ... esac expression.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41347 3c298f89-4303-0410-b956-a3cf2f4a3e73