update-rc.d: correctly look up the initscript params with overrides

The creation of a clone of d with extra OVERRIDES was removed in
72c1fd72d3b479c728e249eaa763116d352e945b but some of the lookups are essential
so that variables such as ${INITSCRIPT_PARAMS} get overriden and resolved
correctly on a per-package basis.

[ YOCTO #3960 ]

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: Ie0aec034e13909cf210824746549142c83bc0681
Reviewed-on: https://g2g.palm.com/1963
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Steve Lemke <steve.lemke@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
update-rc.d: Fix interaction with older package.bbclass

* package.bbclass in oe-core/danny doesn't use PACKAGESPLITFUNCS

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: Iae77da7d09cd4c605ea96e02377e293959e9e4c3
Reviewed-on: https://g2g.palm.com/1964
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Steve Lemke <steve.lemke@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>