Use only the first predictors of compound neighbors in OBMC
Use only the first predictors of compound neighbors in OBMC

Loss of gain in AWCY
HL 0.23%
LL 0 (since no compound is used in LL)
lowres 0.277%
midres 0.248%

Change-Id: I46ad1e2f07411c838f2ca6765de57a60a9c68b12

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