Subzero. X86. Fixes bundle lock/unlock.

The AutoMemorySandboxer does not have to emit a bundle lock/unlock pair
for memory operations in x8632, but the current does emit it. This CL
changes this behavior.

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1661403002 .
1 file changed