sc: clean up Library_scfilt.mk duplication wrt. ORCUS

Change-Id: Ide3c9987fb15112d5a4c8c2b5e15277b2579ee51
fix the PCH after 8e399602ea7aa11a81d704ff6ce8e660df4205b9

Change-Id: Ia5e05901a066619e0e819b3b06c0a7da3b2de536