Fix stack trace printing in d8
Fix stack trace printing in d8

R=yangguo@chromium.org
BUG=chromium:511988
LOG=n

Review URL: https://codereview.chromium.org/1246643002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29757}

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