build: Enable Bionic optimizations on Cortex platforms
* Enable the new NEON optimizations in Bionic when
   TARGET_ARCH_VARIANT_CPU is set.
 * NEON memcpy() optimization is disabled on A15 due to a regression.
Add standard method for enabling mfpu and mcpu code optimization
diffmerged from CM
Cleanup Kejars Wierd Leftovers Lol