vdiff: when validators disagree, report which one accepts and which one rejects
vdiff: when validators disagree, report which one accepts and which one rejects

Review URL: https://chromiumcodereview.appspot.com/10914063

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@9641 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client