Update V8 DEPS.
Update V8 DEPS.

Rolling v8/tools/clang to 4b5142322face2df2374a246dba98ae82be317b0

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/872893010

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#26543}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh