Change-Id: I1e90cf7ab4bb02c0ef119b0bd1596771edefedff
Change-Id: I8fde245b32c9e586683a28aa6925da0b83850b39
Adds masked variance and sad functions needed for wedge prediction modes to come. Change-Id: I25b231bbc345e6a494316abb0a7d5cd5586a3a54