Add hash test for all zero blocks
Add hash test for all zero blocks

To test all zero blocks with different size should get
different crc values.

Change-Id: Ib002d63e2f9b86ab287d201030b8e7a8d381ed2e

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