update-rc.d is now needed by systemd to interact with sysv
scripts, so if we have a mixed system, then we can not uninstall
update-rc.d as it is going to break systemd functionality, we check for
sysvinit and sytemd in distro and also ensure that its not building an
image with readonly rootfs
(From OE-Core rev: 5dd5b8adc225d5c703d85fc0187ae65ff6067b58)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>