Fix fix_debootstrap regex

Signed-off-by: Jan Blunck <jblunck@vyatta.com>
Refactor build_livebuild.sh to remove Debian/live-build specifics

Remove Debian/live-build specific things from build_livebuild.sh and call
the livebuild_pre_run script that might exist in the package sources
instead.

Signed-off-by: Jan Blunck <jblunck@vyatta.com>
For livebuild we have (like kiwi) sub-directories with additional packages in the source folder

Signed-off-by: Jan Blunck <jblunck@vyatta.com>