Use cur_mv to compute the mv cost in handle_newmv
Use cur_mv to compute the mv cost in handle_newmv

This will affect the performance when --cpu-used>=2
STATS_CHANGED expected

Change-Id: I519b64a73c6ec1b995dd52665eec2f2b67258015

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