[migration] fix bootstrap migration of 3.5 : need to support old-style and new-style hooks to migrate from 3.4 to 3.6
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0