lsi-image-large: Add buildessential package group

Add package group for buildessential to have gcc, make etc. on target
when ussing lsi-image-large rootfs.

Signed-off-by: Paul Butler <paul.butler@windriver.com>
sysvinit: Remove sysvinit-inittab and modify rcS script

These changes prevented the /etc/rc[S012345].d/ init scripts from
running at boot time and when the run level changes.

Revert parts of commit 	0558a2d24f30d22e18d869d6b9b5528c605c5722
"sysvinit: Add initial receipe and scripts"

Signed-off-by: Hong H. Pham <hong.pham@windriver.com>