The BufferedRawMachineAssemblerTester takes care of storing and loading
parameters to and from memory for these test cases. By using the
BufferedRawMachineAssemblerTester the test cases become more readible.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1409013004

Cr-Commit-Position: refs/heads/master@{#31718}