core: Enable -mcpu=cortex-a8 flag for Scorpion cpu variant

To be used with
	http://review.cyanogenmod.org/#/c/77758/

Change-Id: I7ecc4707fa45bd7098165615c0521a12c85fb087
(cherry picked from commit a0c643d5916dd58d8d97851a9458c1e2fa9706bc)

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk