replace some mult-long (vmull_u8) with mult-long-accumulate (vmlal_u8)

saves few instructions

Change-Id: If8f464bb2894a209bba94825a4db9267df126d47
NEON intrinsics version of CollectHistogram

apparently faster, but we might save some load/store to/from memory
once we settle for the intrinsics-based FTransform()

(also: fixed some #ifdef USE_INTRINSICS problems)

Change-Id: I426dea299cea0c64eb21c4d81a04a960e0c263c7
Merge "NEON intrinsics version of CollectHistogram"
MIPS: MIPS32r1: Added optimizations for ExtraCost functions.

ExtraCost and ExtraCostCombined

Change-Id: I7eceb9ce2807296c6b43b974e4216879ddcd79f2
Merge "replace some mult-long (vmull_u8) with mult-long-accumulate (vmlal_u8)"