* Merge from debian unstable (LP: #391918), remaining changes: - Add lpia to supported architectures. - debian/rules: Create file for debhelper to pick up, use debhelper to install it. - debian/libxenomai1.dirs: Do not create directory. - debian/libxenomai1.preinst: Remove symlink on upgrade, remove old udev. rule unless modified in which case move to new name. - debian/libxenomai1.postinst: Do not create symlink. - debian/libxenomai1.postrm: No symlink to remove. - Bump build-depend on debhelper to install udev rules into /lib/udev/rules.d, add Breaks on udev to get correct version.