import remote_build_metadata.py.

In addition to compare_build_artifacts.py, remote_build_metadata.py
is also migrated to src/tools/determinism.

TBR=maruel@chromium.org
BUG=314403

Review-Url: https://codereview.chromium.org/2270633004
Cr-Commit-Position: refs/heads/master@{#414132}
1 file changed