Reduce size in FrameSizeTests for 32-bit arch
Reduce size in FrameSizeTests for 32-bit arch

BUG=aomedia:394

Change-Id: I7d9e413dcd0fe832aaec570bc6c1f0d2b644de09

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