Rolling v8/build to 45574dce74fca42e485fbc5cd78bd24bcfeb905f

Rolling v8/buildtools to adb8bf4e8fc92aa1717bf151b862d58e6f27c4f2

Rolling v8/tools/clang to 6d377a47e9c668c7550d17a7d4e6ba9f5931703a

Rolling v8/tools/mb to c78da3f5bccc979b35907c4cbf937aa5187e41fa

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

Review-Url: https://codereview.chromium.org/2240213004
Cr-Commit-Position: refs/heads/master@{#38628}