Rolling v8/build to de44ba22d7b4cd7c4285be52a4491f19a9f6c864

Rolling v8/tools/clang to 749adbcdf8277f1b305ee55f921d9246d4aedd45

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review-Url: https://codereview.chromium.org/2037593003
Cr-Commit-Position: refs/heads/master@{#36692}