sysvinit: Fix Reproducibility issue

sysvinit: Fix Reproducibility issue

With a sequence like:

bitbake sysvinit
bitbake sysvinit -c clean
bitbake sysvinit -c package_write_ipk -f

then the resulting package has two files with group "root/70" rather
than "root/shutdown". The issue is that of do_package is a setscene
task, base-passwd isn't present. This patch fixes that dependency
but there may be other cases of this problem around.

[YOCTO #13776]

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>