Minor fix to GLOBAL_MOTION_RATE
Minor fix to GLOBAL_MOTION_RATE

Removes spurious ';'

Change-Id: I63c9fe1ef116d1d3c6a61a55072445a2b913b616

smarter/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,mbebenita/aom,mbebenita/aom,luctrudeau/aom,smarter/aom,luctrudeau/aom,luctrudeau/aom,mbebenita/aom,mbebenita/aom,smarter/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,mbebenita/aom,GrokImageCompression/aom