Use '-f' ('--force') option so that while removing packages using deb,
we don't fail because of the following error:
update-rc.d: $initd/$bn exists during rc.d purge (use -f to force)
Using '-f' option would make this a warning but continue to execute.
update-rc.d: $initd/$bn exists during rc.d purge (continuing)
We need this option because dpkg package backend have special handling for
configuration files. And if files under /etc/init.d are treated as configuration
files, we will have errors.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>