Force full rebuilding after clang rolls.
Force full rebuilding after clang rolls.

BUG=chromium:464657
LOG=n

Review URL: https://codereview.chromium.org/987063002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27081}

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