enabling aom_lpf_horizontal_16_sse2
enabling aom_lpf_horizontal_16_sse2

SSE2 version already extended to support
13 TAPs

Change-Id: I58e04527b297256b6ca63b12097d9345196a12bd

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom