Because the operands in this test are encoded in little endian format.
Therefore, their bytes are all swapped when reading them on big endian machine.

R=mbrandy@us.ibm.com,joransiu@ca.ibm.com,titzer@chromium.org,machenbach@chromium.org,bradnelson@chromium.org,ahaas@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1858793002

Cr-Commit-Position: refs/heads/master@{#35262}