update-rc.d.bbclass: ignore init script return code

update-rc.d.bbclass: ignore init script return code

We need to ignore the return code from the init script 'stop' command in
the preinst and prerm scriptlets. Otherwise package upgrade or
deinstallation (at least when opkg is used) is likely to fail if the
daemon is not running. That is because an init script possibly returns
'1' if you try to stop a service that is not running which, in turn,
causes the scriptlet to fail which, in turn, causes the package
(de-)installation to fail.

[YOCTO #10299]

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>