Pass correct stream to the print for the constant_pool so the debug
print doesn't go the stdout.

Change-Id: I12952e5fa52e4890beaa490601f053128fd2b89a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1672938
Auto-Submit: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62332}