IVGCVSW-3161 Bug Fix in Nearest Neighbor implementation;              consider 4 neighbors instead of 2.
IVGCVSW-3161 Bug Fix in Nearest Neighbor implementation;
             consider 4 neighbors instead of 2.

Signed-off-by: Teresa Charlin <055614f843994492feda310af0dd7304fb61904c@arm.com>
Change-Id: Ia724b35f723157e9f51b5345964200f126b98267

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn