AOM_DSP_COMMON_H_ -> AOM_DSP_AOM_DSP_COMMON_H_
AOM_DSP_COMMON_H_ -> AOM_DSP_AOM_DSP_COMMON_H_

This commit adds the prefix of directory name to be consistent.

Change-Id: I91300433eafe96ca1c7dff242801b9c924361d32

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